Timegrapher questions

Actually, I said it is a Venus 170! But I do not remember the lift angle - I serviced one of those but it was a long time ago.

Hard to say. What I can see on your least picture does not prove it has not been serviced, as it could have been serviced without a precise regulation and set of the beat error. I am not sure Al (@Archer ) would call that a proper service though! But for an "eBay service" (please do not ask me to give a definition of that!), I have seen worse!

If it's consistently fast to the same extent in other positions, and it can be regulated down to an acceptable rate, then I'd be happy with it. The lines look fairly straight, and the beat error isn't the end of the world.

However, if the timekeeping is all over the place in different positions, then you have to decide whether you can live with it, or if it is worth the expense of getting it sorted and adjusted. It might not be easy, could be costly, and may still not be as perfect as you would like.

It's an old watch and has likely had a lot of wear. It probably wasn't a brilliant timekeeper when new compared against modern standards. It's unusual, attractive and I think you probably paid a reasonable price for it.

I'd suspect it has actually been disassembled, cleaned and lubricated to some basic level, but hasn't had time spent on adjusting and regulating it. Unfortunately a watch "service" can mean different things to different people.

I've got several old watches that don't perform brilliantly, but I like them for what they are, their style and the era from which they came. They've mostly been basically serviced in terms of cleaning and lubricating, and then regulated as best as can be, but they aren't worth the expense of having them worked on to improve them. I wear them only a few hours at a time probably, so the inaccuracies don't amount to much in real life.

That is actually quite a sane advice. I'm just worried without a proper service the gears might wear and tear faster

I could not find Lift angle for the cal 170, but the cal 188 is 42 deg.