Looks like an (869108/04) "NS" dial in a (20375/204604/869101/869114) "Geneve" case. https://universalgenevepolerouter.com/referencegallery/
I don't believe this is the correct case for the NS> This case more resembles of the Universal "Polerouter Geneve". Is the crown pulled out or it is in that position? This dial configuration of the NS is not common too, most of the black dial I've seen with nipple dial.
This one, an impulse ebay purchase - condition is nice with an original buckle and cal. 1205 movement which I've only ever seen in Railrouters. (excuse the photo nicked from the ebay listing - lighting isn't up to taking a wristshot). Curious to know if there are many other non Railrouter cased 1205s about
To honor my aunt celebrating her 90's birthday today and looking forward to the SAS Polerouter auction tomorrow.
The big question is, dare you bid on it? (I'm ever so tempted but sadly too poor to realistically have a chance of winning!) At least we can console ourselves with 10234 DeLuxes which havent been spoiled with esoteric, wobbily engravings... A happy 90th birthday to your Aunt!