I just found an Admiral "phantom 3rd Channel" stereo. The model #s are either, y4850, y4870, y4880. I can't seem to find any info on it on the internet. I'm not sure what year it is, i'm hopeing someone can help me...Elliemay
To find the production date you need to take the back panel off. (that is if it is tube) There are two sets of tubes. On the bottom set of tubes... gently brush of any dust on the bottom metal area (left center if looking from back). There is a date stamp.