Help identifying a vintage Rotary

Got this vintage Rotary off eBay, arrived in the post yesterday, integrated bracelet design, Swiss made, the bracelet style is very similar to that of the modern PRX but with folded links. Hand-wound 21600BPH movement and a stunning blue sunburst dial measuring 37mm that shifts from dark blue to light blue to almost purple depending on the light conditions. Anyone have any ideas? Not been able to find anything about this one online apart from 1 other listing from the same bloke I bought this one off but I would assume it's a 70s watch. Tried to take the screwdown caseback off to find the movement but struggled to do so (admittedly I was trying to do so after a few too many beers, so we'll try again sober 😂).

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Can’t help but it’s a nice looking watch

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Not 100% sure myself, but I can ask the team and see if I can get an answer!

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fraserjames

Not 100% sure myself, but I can ask the team and see if I can get an answer!

Please it'll be good to figure out what it is

Unfortunately since had some issues with time-keeping, I think the old owner hadn't serviced it (possibly why it was going for quite cheap) and as a student I have to be a bit careful with money, but I'm hoping to get it serviced and working again in summer when money is a bit less tight

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SomeGingerWatchNerd

Please it'll be good to figure out what it is

Unfortunately since had some issues with time-keeping, I think the old owner hadn't serviced it (possibly why it was going for quite cheap) and as a student I have to be a bit careful with money, but I'm hoping to get it serviced and working again in summer when money is a bit less tight

Yes that makes sense - definitely recommend getting it serviced! There are loads of good third party jewellers who will service to a high standard, or you can go direct to the brand if you wanted. I know the service team at Rotary and they get quite a few vintage watches for servicing

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SomeGingerWatchNerd

Please it'll be good to figure out what it is

Unfortunately since had some issues with time-keeping, I think the old owner hadn't serviced it (possibly why it was going for quite cheap) and as a student I have to be a bit careful with money, but I'm hoping to get it serviced and working again in summer when money is a bit less tight

P.S. They also might be better for helping you identify the exact model! I can't seem to find it