: What does anyone think? Are these less valuable than versions with
: the markings etc? Should I just go for a good vintage version
: with all the markings?

I'm not certain the lack of issue markings will greatly effect the value. Over the last few years i have noted the Sinn refurbished models & some original Heuer un-issued versions of this watch acheiving very similar values to the clearly issued versions. The only point of note is that there are some very focussed military watch collectors out there & although they are probably not ready to part with more money for an issued model , they do seem to be prepared to wait for an issued version to come up over the non-marked versions.
- Darren