05/28/2026
Finished making this custom molded cowhide case which is lined with goatskin to protect this unique scientific calculator. This HP 35s is a Hewlett-Packard non-graphing programmable scientific calculator that was introduced to commemorate the 35th anniversary of the HP-35. The HP 35 was the world's first pocket scientific calculator introduced in 1972. The HP 35s has been given a retro look reminiscent of classic HP calculators from the 1970s to the 1990s. However, it provides far more functions, processing power, and memory than most of those earlier models and was discontinued in 2021. Today, since there is no direct modern substitute, it often commands premium collector prices on the second-hand market. Check out our leatherworking shop in Dartmouth, Nova Scotia, Canada at https://leathersmithdesigns.com/