Here is what Bonanza owner, Larry G., has to say about Miller Clock Service:
Miller
Clock Service & Sales in Oshkosh, WI. Their store is on
Koeller Street – about a block north of Target, in a little. They
have a booth at AirVenture, too.
https://millerclockservices.com/
The
clock repair guy is Jeff. He’s fixed 2 of ‘em for me. One’s
in my plane. It’s a Mathey-Tissot chronometer out of a King
Air. Certified chronometer, not an 8-day aviation clock, but same
form factor. Mine needs winding about every 36 hours. It’s a
magnificent instrument. Work of art.
Larry