HP-01 Case Opener on TOS

[Geoff Quickfall]

Yes, is the short answer, read on.

The HP01 case has a piezo (bender) mounted (epoxied) on the inside back of the case back. The wrench slots for the case wrench are "holes" through to the bender, which is used as the water proof cap on the inside of the case back. The holes (wrench slots) enhance the sound releasing it directly to the air versus muffling in a sealed case.

I have the same wrench but the tips project too far into the wrench slots and will bend, deform or puncture the bender. Hence the reduced tips on the HP wrenches.

I have 8 of these restored and four needed new benders due to a watch maker using the standard wrench you pictured and destroying the bender through the wrench slots. Probably for a battery change.

Of course, if you are very careful and do not run into a 'welded tight' case back, that wrench would work.

Cheers, Geoff

35 restored Accutrons and counting!