Posted inGronefeld Watches Gronefeld, Bart Massena LAB (watches) Naito, Akio Rohr, William Seiko Holdings Corp Watches and Clocks
A Tale of 2 Chronograph Watches
The Tentagraph by Grand Seiko and the 1941 Grönograaf by Grönefeld are the same kind of timepiece, but as different as they could be.