PATEK PHILIPPE BETA 21 REF. 3587-2 YELLOW GOLD

Fine, rare and large cushion shaped 18k yellow gold wristwatch with beta 21 movement. Blue dial, date and center second.
* The firm Patek Philippe, along with other Swiss manufacturers, became part of a new endeavor, the ‘Electronic WatchCenter’ (CEH), for the study of a quartz wrist caliber. Developed and finished after one year of research, the caliber Beta21 (29 x 24,3 mm.) was ready for production in 1969 and was presented at the Basel Fair in 1970.