RGM Model 501-EFB
Release

RGM Model 501-EFB

1 source
At a glance
Price
USD 16,950
Case size
39mm
Lug-to-lug
48mm
Thickness
11.3mm
Case material
316L stainless steel
Movement
Schwarz-Etienne ASE 200 automatic micro-rotor
Power reserve
86-hour
Water resistance
50m
Crystal
Box-style sapphire (front), Flat sapphire (back)
Dial
White Grand Feu enamel
Strap
Alligator leather
Availability
September 25, 2026
The brief

RGM Watch Co. has revived the E.F. Bowman name with the Model 501-EFB, a wristwatch inspired by a 1920s Patek Philippe made for E.F. Bowman & Sons. This release connects RGM to a local Pennsylvania horological legacy, with the watch built on an existing platform but featuring details that evoke Bowman's historical timepieces.

  • Price: USD 16,950
  • 39mm stainless steel case
  • 48mm lug-to-lug
  • 11.3mm thickness
  • 50m water resistance
  • 86-hour power reserve
  • Debuts September 25, 2026
Across the sources

The watch is based on an existing RGM platform, similar to a model produced with Teddy Baldassarre.

Monochrome Watches

The white Grand Feu enamel dial and blued-steel hands for hours, minutes, and subseconds are inspired by a 1920s Patek Philippe pocket watch made for E.F. Bowman & Sons.

Monochrome Watches

A railroad-style track runs the dial's periphery, with a smaller track for the recessed running seconds at 6 o'clock.

Monochrome Watches

The Schwarz-Etienne ASE 200 micro-rotor movement features rhodium finishing, Côte de Genève, perlage, and a solid-gold micro-rotor plaque made by RGM engraved with 'Ezra F. Bowman'.

Monochrome Watches

Gold or platinum case options can be ordered upon request.

Monochrome Watches

The Model 501-EFB will debut during the Lancaster Watch Weekend.

Monochrome Watches
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