This is an unfinished but original Omega titanium case for:

OMEGA Seamaster Diver 300M Master Chronometer Watch – 007 Edition

Model number: 210.90.42.20.01.001

Ref/SKU: seamaster-21090422001001

42mm

Co-Axial Master Chronometer 8806.

May fit other models of this line. 

This is an empty case without glass or back cover.

This item comes from a parts dealer in Switzerland.

Original but unmarked.

I have 4 pieces available. Sold individually. 

I still have two matching helium valves available. 

Offered separately.