Home / Cases / Ezra C. Fitch Rare Pantented “Beveled Invisible Centre” Watch Case Design Sold By Pforzheimer, Dreyfus & Keller: Part 2 – The Silver Case

Ezra C. Fitch Rare Pantented “Beveled Invisible Centre” Watch Case Design Sold By Pforzheimer, Dreyfus & Keller: Part 2 – The Silver Case


In my most recent article, we explored Ezra C. Fitch’s 1874 patented design, a rare clamshell watch case originally sold by Pforzheimer, Dreyfus & Keller. At the time, the only known surviving examples were 18K solid gold cases.


P.D.&K. 18K Solid Gold Fitch Patent Case
P.D.&K. 18K Solid Gold Fitch Patent Case

As a result of the article, a reader supplied images of a sterling silver case sold by Pforzheimer, Dreyfus & Keller, expanding the known production of the Fitch 1874 patented design to include multiple material variants.

The sterling silver case houses an 18-Size Appleton, Tracy & Co. movement manufactured by the American Watch Company (Waltham) [#993144], consistent with the movement pairings found with the 18K cases. This image represents the only known surviving example of the PDK sterling silver “beveled invisible centre” case.


P.D.&K. Sterling Silver Case #6175 - Fitch "Beveled Invisible Centre"
P.D.&K. Sterling Silver Case #6175 – Fitch “Beveled Invisible Centre”
Image Courtesy of an Anonymous Contributor

The case markings are more elaborate than those found on the 18K gold cases, marked with a P, D, and K surrounding an illustrative depiction of a set of scales. “Sterling Silver” is embossed inside an arched banner, and “Patented June 9, 1874” is included to credit Fitch for the design.


P.D.&K. Sterling Silver Case #6175 - Fitch "Beveled Invisible Centre" Case Markings
P.D.&K. Sterling Silver Case #6175 – Fitch “Beveled Invisible Centre” Case Markings
Image Courtesy of an Anonymous Contributor

As with the 18K gold cases, the PDK sterling silver cases encapsulate the center of the case like a clamshell, leaving a single seam around the perimeter of the case.


P.D.&K. Sterling Silver Case #6175 - Fitch "Beveled Invisible Centre" Showing Single Seam
P.D.&K. Sterling Silver Case #6175 – Fitch “Beveled Invisible Centre” Showing Single Seam
Image Courtesy of an Anonymous Contributor

We are fortunate to have readers actively engaged in sharing information and photos, as it builds a better environment for researchers and enthusiasts. I appreciate the individual who anonymously provided the images of the PDK sterling silver case to enrich our understanding further.

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