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Longines VHP accuracy

40133 Views 122 Replies 14 Participants Last post by  ronalddheld
Fellow watch nerds!

I have a Longines Conquest VHP watch that runs too fast. Faster than the 10 seconds per year that Longines advertises with. My watch gains 5 seconds per month. Almost a minute per year.
I have been keeping an eye on it, for a few months now, and it is very consistent at gaining one second every 6.5 days.

It might be due for a new battery since it is almost 8 years old. The second sweep still moves every second though.

It has been quite good so far, although I have not paid it as much attention before. I think it used to be one or two seconds out per month.

Anyone else has experiences with a VHP? I read that the rate can be adjusted when serviced. Is that a good idea? Who could do that?

It is a 1999 Conquest Perpetual Calendar Calibre 546. It has 'L1.632.4' inscribed on the back. Not too sure what that stands for.

Cheers
Hans.
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My VHP 200m has been on display for a few years. Over the last 12 months it absolutely astonished me by staying on the correct second ! So much so I started wearing it again, and of course it started to run fast (roughly +6spy), so out came the perspex disc and wires. There's zero feedback so not sure my attempted one impulse on C- was good. ...time will tell.
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Longines Conquest Perpetual V.H.P 200m (ETA 252.611) manual pdf. attached.

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My VHP 200m has been on display for a few years. Over the last 12 months it absolutely astonished me by staying on the correct second ! So much so I started wearing it again, and of course it started to run fast (roughly +6spy), so out came the perspex disc and wires. There's zero feedback so not sure my attempted one impulse on C- was good. ...time will tell.
I'm in North West UK and would like to find someone reliable for a strip/clean/relube for my VHP. Does anyone have a recommendation. If not in the NW, I'm prepared to post it.
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