Horological Meandering

It has taken me 36 months to finally get this watch. First saw it on June 9, 2021 from instagram. Sent the watch for servicing : ...  

This looks like an earler version of the Nivada Grenchen Depthomatic (vs the telephone dial version). This measures about 39mm in diameter. ...  

Must have been quite a challenge to get your hands on one of these, you don't see then too often. How did you find yours?

I was browsing through local Carousel and saw the watch being advertised for sales in HK ...  

Here is another Depthomatic... ...  

Looks like a super compressor diving watch with the movable inner ring

Congratulations. Where did you find it?

One from Carousel and another from a watch repair shop selling vintage watches

I have only managed to own two and the rest are borrowed photos from the internet. There are two kinds of dials design, one with 12,3,6,9 and another full numerals telephone dial (black and silver versions) ...  

What a cool Watch!!!