New generic tube for Breitling Colt for ref. A17350, A17050, A64050, A64350, A74350, A77387, A45355, B45355
Excellent fitted with Breitling crown.As you know in these models tube soldered inside case.You will need cut off the old tube and fit new one with loctite.Watch will be waterproof with this tube if everything done correctly.
Please find here sizes of tube
Tube to case lenght, push in section (not threaded) 2,5mm
Thread crown 3,5mm
Tube to case external diameter 2,2mm