![ISO Swiss Flat Case Back Gasket number 631, package of 2, ID 27.50 mm, OD 29.50 mm, thickness 0.40 mm](http://perrinwatchparts.com/cdn/shop/files/67-5105-160_fba276ab-8a1a-4799-bbed-f4b9f8331b0b_300x300.jpg?v=1710962137)
ISO Swiss Flat Case Back Gasket number 631, package of 2, ID 27.50 mm, OD 29.50 mm, thickness 0.40 mm
by Perrin
$2.45
SKU 67-5105-631
ISO Swiss flat case back gasket number 631, package of 2 gaskets, ID 27.50 mm OD 29.50 mm thickness 0.40