BB731SO Contraves Spain Sales
Contraves BB731SO appears to be a Contraves-branded industrial switch/multiswitch part sold in legacy inventory listings. I could verify the exact product code on multiple product pages, but I did not find an official manufacturer datasheet with detailed specs for this code.
Technical Specification
Type: modular Multiswitch / thumbwheel switch element (Contraves BB731 series)
Form: single digit/module for in-line multi-position selector assemblies
Related parts: BB731LU (left end), BB731S0/SO switch body, CU400270 connectors, Binder housing kits
Use: manual digital setpoint / decade input on industrial control panels
Construction: rotatable switching wheel, modular block assembly with threaded rods/end angles
Electrical contact ratings: not published in open reseller catalogs (legacy Contraves Multiswitch family)