I purchased a pair of Altec 416's about 15 years ago. I think were were 8 ohm B's. They have been in storage since then. I took them out a few weeks ago and both are missing their back covers. I don't recall if I ever had them or lost them. There is nothing that I can see anywhere that identifies them. They have the stamped spiders as apposed the the cast, and one magnet is painted grey and one black. The cones look rather new and have white numbers printed on their backs. This isn't a lot of information, but I am hoping that someone here can help me identify them without posting picture, which I don't have permission to do yet. Any ideas will be appreciated.