I like the strap, as I feel it matches the style of the watch (NATO would have probably been preferred but there are no scuff marks underneath and I didn't want to add my own!). Gives a nice "aviator" feel.
The stamp on the back is the model/serial number (top line), and production number/year (bottom line). I reckon about 2,000 were produced in 1974 from what I can find out online.
There are marks and scratches from years of use before I inherited it, but I think it scrubbed up well when I had it renovated in 2014.
I have tiny wrists so although this is an unusually small watch face compared to the average watch you see today (lugs are 38mm I think but the crystal is much smaller - very 70s!)
Fantastic looking piece.
Might look good on a leather nato too.