stål, automatisk, plexiglas, läderband, datum, ca 1975
Caliber TDBK (Tenor Dorly Brac Kelek) 1369
Bruksskick, trög krona, Slitage. Repa på glas.
The chronograph part of the watch was designed and assembled by Dubois Depraz. This was built on top of the existing Tenor Dorly 1335 calibre with help from Brac. Kelek was overall responsible for the production (J.R. Gorgerat, Kelek SA, hence the JRGK).
All this resulted in the smallest chronograph (at the time) when presented to the press in 1974. According to Dubois Depraz 25.000 pieces were made.