Here is an Altec 288(?) driver.  It has Altec cast into its dust cover but the label is IPC  Its label has faded away so I cant make out the whole model number or serial number but it appears to be IPC Model LU1104.  As you can see in the picture its DCR is 13 ohms.  Sound comes out when connected to an Iphone.  I can not  tell for sure if the red paint seal on the cover is broken or not.  It may have the original diaphragm in it.  Because of its age and because I learned my lesson on what buyers can do to a driver once they receive it then accuse the seller of shipping a non working thing, it is sold as Parts with not guarantee or returns.  And again because of previous experiences, the auction is for the driver only and does not include any dust, dirt, cat hair, the ohmeter or its probes, the stool that is is on in the pic nor the rug in the background or any other possible visible or imagined things in the background