The other side of the movement from before. @r.michelsen.watchmaker was spot on guessing 6620. Simpel and pretty movement by Rolex. Not only did they produce the mighty OysterQuartz, these slim and simpel movements were used in the Cellini line. With just an hour hand and minutes. The 6621 caliber featured an updated electronic with modern inhibition instead of the prone to failure type trimmer on the 6620. The 6620 began production around 1987. Hopefully Rolex will reenter the quartz arena, not only do they have the chops to make them great, they also have a lot of patents lying around. Did you know that prototype OysterQuartz were made with perpetual calender? It was called cal. 5335. Happy Wednesday.
#watchmaker #Rolex #cellini #oysterquartz #Quartz #Klarlund #RolexCanBeFun - 14 hours ago