Post pics of your watches ***Please NO QUOTING PHOTOS***

Made in Sweden eh? Now that's something I wouldn't have expected. I would have thought they'd have gone to a Swiss company. Very cool. I notice the text is written in America English. "Honored" instead of "Honoured", so maybe destined for the US market originally? That would also explain the Wittnauer tag as early on in that market they shared distribution(Longines also timed, cased and distributed Vacheron Constantin and Jaeger LeCoultre for the US market).

Note them advertising their sport timing, accuracy awards and being the first watch of aviation and exploration. There was a time when Longines had a background in those areas that marques like Breitling, Omega, Rolex etc would have killed for, a brand like IWC wasn't even in the same universe. In Chronometer trials Omega were nearly always in second or third place(after Zenith) and Rolex didn't even get into the same league until the 1960's.

In the cold light of morning a wartime date seems bang on. 42/43 kinda date. Is it a steel case, or gold/gold plated? You can tell gold plated if it has a steel back to it. Fully gold cases have gold backs. I'd say it's a smaller watch by today's men's watch standards? 30-32 mm across? If it's 35mm then that adds more value to it again.

For my money this is one of their nicest designs and one that no doubt they'll do a heritage reissue of soon enough.

On servicing, sorry I don't know SB. There is a chap in Kilkenny. Here's the link to him. He does very good work on vintage watches, but he's a bit a ways from you. It's a very nice watch in original condition that has a bit of value to it personally and financially and I'd be dubious of leaving it with someone who didn't know what they were doing. Their movements are very well put together and spares are handy enough to find(and reasonably priced) for movements of this era so that's a major bonus. One thing about them as a company is that they tended to produce one mid/high grade of movement. Others had more of a range from cheap to expensive chronometer movements, Longines produced chronometers, but they didn't seem to push them like others. Their "ordinary" movements can usually be made to be close to chronometer accuracy anyway.

Solid gold as well? Very nice. If it is more for the US market it's likely 14kt gold, if it's 18Kt add more value again. It's great to see really nice vintage watches like this from very good marques still coming out of hiding