Were these speakers all the same pin outs and field coils. In other words, should work in any chassis that requires the Bee H. speaker.

They were electrically different, depending on the field coil requirements of the particular chassis. For example, those used on a 12 tube push-pull chassis used a speaker with a lower field coil resistance than those used on the 9-toobers. The beehives themselves were identical for the 9 and 12 tube models AFAIK, but the beehives for the 15-toobers had a bigger cut-out on the inside to accommodate the larger output transformer on the speaker. You could probably use a 15-tube beehive with any speaker, but you couldn't use a 9 or 12 tube beehive on a 15-tube speaker.

Bob

Heres the number on the bee hive speaker S5604 K. How do I find whichZeniths used this part #?

Do you have the speaker that it came with? You could tell that way. I dont think you can tell from the bee-hive #.

Is there a part # on the speaker frame? Should be 49-XXX. The last 3 digits will correspond to the model #.

I asked the owner to pull the bee hive and tell me the number on the speaker. He wrote back and said there wasn't a number on the speaker. Oh well.

Found out the number 49 AB 185 Whats it match up with???
After research I answered my own question, (9S -262, 263, 264 all 12" speakers.