Fascinating history, and an excellent post! Anyone out there ever seen any of these Swiss razors...? I'd bet the build quality is superior.La Reine des Lames (The Queen of Blades) manufactured by Jacques LeCoultre & Co., S.A. of Le Sentier, Switzerland, in 1950. The blades were originally included with the Jubilé-LeCoultre box-set.
This box of La Reine des Lames was included in a little package containing a Philite* razor and some paperwork. It was released in 1950 to commemorate the founding of Jacques LeCoultre & Cie, S.A., in 1825.** The paperwork indicates it was produced by Jacques' descendants. Without getting into genealogy, it is difficult to say how exactly they were related to the famous watch making family associated with the Jaeger-LeCoultre name (also of Le Sentier).
LeCoultre once made music boxes, watch cases, straight razors and other sundry items. They started making razor blades and double edge razors in 1918. Their double edge razors were probably the first that were made in Switzerland, and they are distinguishable from other Swiss DE razors insofar as they tend to look more similar to Gillette OTs--with deeply notched teeth. This design was copied by other Swiss manufacturers such as H. Ackermann, Helvetia, Rasofin and Rasex, et cetera.
What is interesting about these particular blades is that they are made of what appears to be stainless steel, and the steel is very springy. It is known that LeCoultre used English steel (Sheffield?) for their older frame-back straights. Perhaps they used this same steel when they began making DE blades back in 1918?
*The razor was produced for LeCoultre & Co without any logo. Philite is mentioned in the paperwork.
**Jacques LeCoultre & Cie, S.A was used much later. LeCoultre changed their name many times.
The photo of the blade was rendered in black and white because of the intense glare caused by nearby incandescent lighting.
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