In this case, the P-104 Selectron is configured to calculate speed and distance in kilometers, a nod to the watch’s aerospace roots. With a little practice, it is surprisingly simple to use.
Founded in 1956, Ollech & Wajs specialized in slide rule bezels during the 1960s and 1970s. It provided different logarithmic scales geared toward dive watches, pilot watches and racing watches.
Although this watch is reviving the Selectron name, it is actually a rebranding of the newer P-104 design with an updated logarithmic scale bezel.
The heart of a dive watch
The Quartz Crisis of the early 1980s, along with advancements in pocket calculators, forced the brand to shut down.
However, it was resurrected in 2019 and launched with two new references, including the P-104.