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hewlett packard HP-01 restoration

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OmegaMan77

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hewlett packard HP-01 restoration

Post21 Nov 2016, 22:42

Hi folks

Who (if anyone) restores HP-01 watches to their former glory on here?

I am talking about restoring the case and crystal (if possible)

Also I know module restoration is possible thanks to a thread I saw on here.

I dont have a HP-01 yet, but this is just for future reference. :grin1:
Only the most simple can accomodate the most complex.
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Kasper

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Re: hewlett packard HP-01 restoration

Post04 Dec 2016, 15:07

You are here to learn my friend. It takes time to restore a case and glass. You have to do it yourself cause its way to expensive to let others do it for you.
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OmegaMan77

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Re: hewlett packard HP-01 restoration

Post04 Dec 2016, 22:22

Kasper wrote:You are here to learn my friend. It takes time to restore a case and glass. You have to do it yourself cause its way to expensive to let others do it for you.



Teach me then, O Master.....
Only the most simple can accomodate the most complex.
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767Geoff

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Re: hewlett packard HP-01 restoration

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OmegaMan77

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Re: hewlett packard HP-01 restoration

Post04 Dec 2016, 23:28

Only the most simple can accomodate the most complex.
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coconutman351

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Re: hewlett packard HP-01 restoration

Post10 Jun 2019, 21:23

Any recommendations on restoring a gold filled bezel? The bezel does have some scratches but no gold has been been scratched off. Am I better off just doing a polish vs. light sanding to obtain a smooth surface like how you restore a SS model. The Pulsar GF appear to be resilient to obtain that brushed restoration work. Any feedback would be appreciated.

thank you,
Robert
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gjlelec

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Re: hewlett packard HP-01 restoration

Post13 Jun 2019, 00:02

Take my advice, if you want to experiment restoring, don't do it on an expensive watch like a HP 01. Bite the bullet, take the money and pay someone. I've sent loads to the LED graveyard with my "repairs" Dont know if he'd want to do it but 767 geoff knows these watches inside out. but there are plenty of people on here skilled at case refurbing. The gold plate on these watches is couple of microns pissy thin, it doesnt easily forgive "i'll have a go'ers"- Good luck
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bruce wegmann

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Re: hewlett packard HP-01 restoration

Post13 Jun 2019, 01:27

There is a world of difference between "gold plated" and "gold filled". To put all this in perspective, consider that the average thickness of gold plating is 2-5 microns. A micron is a thousandth of a millimeter, or .00003937 inches (so, on the high side, a typical plating is .0001968 inches thick, or about two ten-thousandths of an inch). As tiny a thickness as this is, it is still 20-50 times thicker than gold leaf (which is usually about 0.1 micron).
Gold fill, in contrast, is usually 40-80 microns thick (Pulsar used the industry standard of 80 microns; about .00315 inch; roughly the thickness of a sheet of printer paper, on the cases...the bracelets were 20 microns). So, gold fill is, on average, 16-40 times thicker than plating.
I would consider plated watches unrestorable, except by re-plating. Even goldfilled watches are marginal, at best; there is still no real amount of metal to work with...anything beyond gentle abrasions or light scratches, is essentially the end of the story.
I can work magic on stainless or solid gold, but, in 15 years, I doubt I have restored as many as a dozen goldfilled cases.
Last edited by bruce wegmann on 13 Jun 2019, 06:20, edited 1 time in total.
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coconutman351

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Re: hewlett packard HP-01 restoration

Post13 Jun 2019, 05:23

Thanks all. Advice taken. This is why I ask experienced members on this forum important questions before attempting any restoration work on vintage timepieces. I truly appreciate your inputs.

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