Here's a couple of pictures of my Zodiac SST 36000.  I bought it probably in 1971 on board the USS Conyngham's ship's store. I can guarantee it is 49 or 50 years old.  It still runs, but having read Butch's info...  looks like it needs service.  While it still runs, it hasn't been running because its been still in a drawer. 

Here are a couple photos:

My mistake, can't add.  Its 39 or 40 years old...   Do I look confused?  ::)

Nice watch. Hard to believe you still have the band for it.