I've recently bought this 666 feet Snorkel from 1960 decade (35mm), but looking for information on the web, I noticed that there are many variations.
In particular, the my Sonrkel seems does not have tritium indexes (they seems of white enamel), it does not have the BULOVA logo applied, but just stamped and the bezel is fixed.
On the dial, at 6 o'clock It has three line line stamped "AUTOMATIC - WATERPROOF - 666FEET"
The case back has the BULOVA - WATER PROOF indication.
Is It an original dial or it is a fake one? I've always seen tritium dial on the web...