Acceptable deviation on a vintage mechanical watch?

My vintage watches deviate from just 2 seconds or so a day (bravo Rolex Day Date) up to nearly two minutes (naughty Cartier Santos.) I’m a real stickler for the time being precisely correct - so it does annoy me a bit (and the santos was sent for a service today..) - But other people I talk to don’t really mind or just reset the time regularly.. So how do you feel about it?
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I like my mechanicals to run under 5 spd, and I enjoy regulating them when needed. But I would cut more slack for a vintage piece that I didn’t wear too often. 

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Depends on the piece, specialty watches that I only wear on the weekend or special occasions ie. Dive for pool or exercise, dress to go out, etc. can deviate as much as 15 - 20 seconds and won't bother me since I'll only wear them a few days and will stop anyway making me having to reset them next time I wear them.... My everyday piece however can't, gives me extreme OCD and anxiety to have my daily deviate even 5 seconds because that'll add up quickly, so now I just wear a quartz.

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We must have different ideas of vintage, as my vintage watches don't hack, so how would I even know if it was off less than a minute or two a day without keeping it running for several days straight?

About two minutes is probably the most I'd accept. What any of mine are, I don't know. Not enough to cause any concern. Running seconds free you of much futile neuroses.

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I always set my watches fast so it doesn't really worry me...if you aren't 5 minutes early for the meeting...you're late!

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+/- 1 minute for every 40 years of age of the watch. If seconds bother you then vintage may not be your game.

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How old is this Cartier? Has it been serviced regularly? Why are you expecting it to be modern levels of accuracy if it’s vintage? 

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ChronoGuy

I always set my watches fast so it doesn't really worry me...if you aren't 5 minutes early for the meeting...you're late!

I imagine this task taking several weeks, or with a dedicated team on retention.

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If I choose to leave the house with one of my vintage pieces, I’m anticipating being in a hurry. 

Up to five minutes is acceptable, even though my dirtiest, not serviced since the 70s or 80s soviet nuggets are capable of +/- 30-ish