Sergei Frolov | Old Russian calculator stroboscopic display @SergeiFrolovMuseum | Uploaded February 2009 | Updated October 2024, 1 hour ago.
Vintage old Russian calculator with amazing stroboscopic display!
You may see additional images of this calculator at http://www.leningrad.su/museum/show_calc.php?n=201
Vintage old Russian calculator with amazing stroboscopic display!
You may see additional images of this calculator at http://www.leningrad.su/museum/show_calc.php?n=201