MF, this post does mention another watch company that has given new life to an IWC Cal 8541. I hope it will be acceptable for this Forum. If you deem it non comercially neutral, I apologize and understand it will have to be deleted.
For those who don't know them, RGM Watch Company is a small and very creative watch company located in Mt. Joy, Pa. run by Roland Murphy. In addition to being highly talented, Roland is a really nice guy. Mt. Joy is near Lancaster, which was home base to Hamilton Watch Co. during its many years of existence.
In addition to its regular line of watches, RGM has created a line based on recased Hamilton pocket watch movements, and has built quite a little niche for itself in building custom, one-off pieces to customer request. RGM operates its own vintage/antique rose engine for hand guilloche of dials and recently began actually making cases in the area, which may be the only US case maker.
The pictures shown are borrowed from their website and show a custom made piece they did for a fellow who bought an orphaned IWC Cal 8541 with Pellaton winding.
The case was made in the US and the solid silver dial was hand guilloched in RGM's own shop. The movement, other than the new rotor and some parts that had to be replaced, is of course IWC.
The watch exudes the classic styles of both IWC and RGM. I'm enchanted that no existing IWC watch was harmed to create this piece. In fact, an otherwise useless IWC movement was given a new life. That's a fitting tribute to and love for one of IWC's classic movements!

This custom watch is a very creative way to bring back to life an orphaned an non-working IWC Cal 8541 movement.

The non-working Cal 8541 needed to have some parts replaced and a new rotor made. If this interests you, read on.