|Re: HP-01 Back Cover Tool (pictures to hook your interest)|
Message #7 Posted by Geoff Quickfall on 4 Apr 2011, 2:32 p.m.,
in response to message #1 by aj04062
I think that it is a great idea (and I would order at least one), and if manufactured correctly then marking the case back would not be a problem.
I have restored over 150 watches, including 10 hp-01's and some of the main case markings are done by over-zealous rough watch repairers scoring the case backs. Mainly due to the incorrect use of the wrench. However a wrench of this style would be unlikely to slip and score the case back.
Another type of case wrench I use is an old India rubber ball (super ball). This of course does not scratch a case back but will also not remove a 'stuck' case either.
The HP-01 'Cricket' comes with (if you are lucky enough) a plastic wrench which contains 5 357 spare batteries, two back case gaskets and of course the prongs which mesh with the grooves in the case back. So the caveat would be that the prongs are not too long!
The problem with standard watch wrenches(figure 1 and 2) is that the prongs are too deep and will ruin the piezo transducer (figure 3 "A") which is attached to the inside case back:
figrue 3 (A: piezo transducer which is visible from the top side of the back case in the deeper part of the recess.)
Of course what posting would be complete without some gratuitous eye candy. For the full posting of this restoration see the following
link: HP 01 RESTORATION. This is an older post and the book contains a much more refined series of photos and labels sans humor! This one actually made it on the BBC series "Antiques Roadshow", albiet, in the background on a display table surrounded by other LED watches.
This is all covered in chapter six of the book!
Edited: 4 Apr 2011, 2:41 p.m.