These are amazing innovative guitars with many unique features and structural characteristics.  Please read more about these guitars below as told first hand by one of the luthiers in the original MICRO FRETS workshop. 
Information about Micro-Frets Guitars from “Guitar Attack” online.
The Truth about Micro-Frets Guitarsby Dan X, a designer & former employee of the defunct Micro-Frets Co.There have been a lot of questions over the years about the Micro-Frets guitar Company on Grove Road, Frederick, Maryland. I have also read a lot of things about the Company, written by guitar collectors that are not true!I lived in Rockville, Maryland at the Monroe Street Apartments. I would drive to Frederick every morning to a job that I loved!!!! I would go to work so fast that the telephone poles on Route 355 whizzed by like pickets in a fence. Make a left on Grove Road and pull into the parking lot on the left. (Now called the Auto Trim Co., but still on Grove Road).Here was the building layout when it was Micro-Frets : You go in the front door, to the left was a door that led to the guitar room. That's where we kept 2 of every model of guitar that we made. There have been some very famous people in the room -- Buck Trent, Carl Perkins, and Mark Farner, to name a few.You come out of that room back into the hall and on the right was the secretary `s office. One of the secretaries that I remember best was a girl about 18 years old named Deloris Schrower, We called her Dee! I had a BIG crush on Dee!!! The next off was where Mrs. Huggins, wife of the head of the company Marion Huggins worked. The next office was Marion Huggins' office.You're wondering by now -- where is Ralph Jones? We're not there yet.Down the hall past Huggins' office you went through a door. Take a left turn and there was the Machinist. I can't remember the Machinist's name, but Ralph Jones worked there sometimes. In front of that was the metal buffing booth. You have to remember most of the parts on the new guitars were Aluminum!!Down from that area was a hole in the wall by the steps. Billy Boggs worked there! He did the fretwork. Billy use to pick with Chet Atkins on the road. Over in front of him was the body lathe, where we hollowed out the bodies. In front of that was the overhead pin router where we cut out the bodies. Farther back was the pickguard pin router.Pete Lagocky, a rock picker, ran that for a while until he just about lost a finger!! Around the corner was the table saw where the pickguards & Pickup pieces were cut out. Back to the steps and up the stairs, just at the top, was the shipping booth. Now this is one big room the whole upstairs was open.To the right was the electronics area. Do a 180 and you would see the paint area. A Magician by night, Painter by day -- a guy called the Amazing Tracy!! He painted the guitars. Beside him was where Mary Jones, the wife of Ralph Jones worked. She sanded between the coats of paint. A real beauty for her age!Everyone wanted me to try to talk her into keeping the plant open. Believe me I tried. I even tried to get out on a date. Didn't work because I wasn't good looking enough, I guess. But I will tell you this she was a nice lady.Down from there to the right was the body and neck wood sanding booth. A little Blond worked there named Linda. She looked like a small child but she was beautiful 19-year old. Do a 180 and you're looking at the guitar assembly stations. There were two of them. One of the stations was mine. A Hippy named Larry worked there also. He was a hard rock picker as well. He quit and I had them put this female assembler over by me. She was a great person and did her job well.Just behind me was Woody Free. Woody assembled the sound hole pickups. His son, my Boss, was Gary Free. Gary was the plant Supervisor/custom builder/guitar designer. Then there was me, Dan Electricbanjoman, guitar assembler & custom builder/designer.Now who was Ralph Jones and where did he work in the factory? He worked the whole factory, and he was at every station at some time everyday making things. He was the creator of the Micro nut, Calibrato, and the FM wireless system.We made the first FM guitar, called "The Orbiter". It was a Swiss cheese model -- front & back & white center piece. There was an FM box that came with that guitar, so you could set the box on top of your amp. The guitar had an antenna that came out of the upper cutaway. I walked down the stairs and out the door one day picking one of those, half way down the street to where the red light is now on Grove Road. It still picked me up through the metal wall to the amp upstairs.We had wild names for the guitars but we all helped name them. Gary, Woody, and I designed the newer bodies, Micro Nut, and Calibratos. We had three different guitar styles: The Swiss Cheese, The Twin, and The Single. First were the Swiss Cheese Models. They were really wild looking, like from outer space, hence the space names like Orbiter, Golden Comet, Calibra, Wanderer, and Spacetone. Ralph designed these guitars. They had Gretsch guitar pickups with a metal case. Huntington ( mine), Signature (mine), the Stage II, the Swinger solid body guitar, the Husky solidbody Bass, and The Spacetone (Woody and Gary Free) -- those were our guitars of the 60`sRalph Jones died and we kept the older guitars there for a while. All of a sudden the order came up to clean them up and get them out! So we sold those out fast. Some of those went overseas to England, Germany, France, Japan, and China. One of those shipments sank in the Atlantic.These were the guitars of the 70's. At that time we bought our pickup formula from a guy at the Rickenbaker Guitar Company in California. We made the pickups out of White Plexiglas, and a few Black ones as well. Mrs. Jones did all the guitar pickup wire wrappings by hand. She had a booth 8 feet square. It was a big secret so they kept the curtain closed.We would work all day and sometimes for no pay on the weekends. We redesigned the pickups, the bodies, and revamped the Micro Nut and Calibrato units.The rumor is that the guitar just didn't sell so we had to close. NOT TRUE!!! We closed about four years after Ralph Jones died. Marion Huggins was the money man. He wanted to keep the place going, and would have if it were up to him. I would still be there making guitars! Mrs. Jones wanted the company to close with her husband. "It's his invention", she used to say. "I don't want anybody to take credit for it. I want to get my money back out of it, and I just want this place to just go away."There was a court trial, I think in Frederick, Maryland. There would be a case on file. Jones v. Huggins Micro-Frets Corp. It is probably public domain now because it's been 30 years. Mrs. Jones won the case. I watched people's jobs get cut one at a time. They cried as they walked out the door! I was one of the last ones to leave, and I cried too! We made thousands of great guitars, and were getting to bring out a couple new ones that Gary, Tracy, and I were drawing up. Our sales were good all over the USA, Canada, and the world. Our Patent covered all countries. Nobody could make the Micro-Frets nuts and Calibratos but us! Now I hear that a company in Japan is buying up all the guitars. They plan to make the Micro-Frets again. So the older USA made ones will be real collectors now.We were all musicians in that factory, and we ate across the street at a 50's style restaurant called the Pontiac Inn. We would always eat lunch there, and sometimes dinner. We were a very open about trying new things. If it was weird we liked it. To us every guitar was different -- every guitar was the Batmobile! It was great fun. If you like customizing guitars, then you should have been there son!  Pretty girls and great people to work with. Life at Micro-Frets in Maryland was a guitar customizer's heaven on earth. There was me and one other guy who put the guitars together. During the last year the other guy quit and I had them hire this nice looking young girl guitar picker. She was with us until early 1973. I was the last one left. I worked the last two weeks for free putting the guitars together before the company was auctioned.We were all working musicians. I played some with Waylon Jennings and Dottie West while I was there. Gary Free had his own local Blues & Jazz band.