It's very well made and wonderful watch which I’ve owned a few version of these, This one is now discontinued so only can get on secondhand market.
Width 41mm (excluding crown) Thickness 14.5mm (including dome windshield) Lug width 20mm Sapphire glass Miyota 9015 with hack function
Brilliant reliable movement in this watch.
Condition wise is very good, I can’t see a mark on the front of the watch, but as a used watch could be something somewhere on the front.
On the case back there is what’s known as nato strap burn (it’s a light one but can been seen at certain angles as per the photos) this has come from a previous owners strap.
The watch comes loose (no box or card) I have messaged Helson and they confirmed form serial number they sold the watch August 2020. They offered to reissue the warranty card, which I didn’t go for but new owner could get one if they email them.
It comes on the strap in the photos which I think suits it perfectly as both have the beige/cream tone to it, and also the original unaided Helson isofrane strap