


able to open the case back and take pictures on the movement ?
if the movement in rectangle shape, then most likely it is Beta 21.
what a lovely watch, congrad ~
should have CEH B21 engraved on plate as well.
IWC named the caliber as #2001 and #2002.
and they applied Beta 21 on the first version of Da Vinci in 1970.
Thanks for sharing.
Enjoy it.
Vte