Case opener set BRT

6 of the most common inserts made of stainless steel for opening 12 or 15-cornered case bottoms of high-quality aviator watches of the brand BRT.

Compilation:
1 insert with 15 edges (inside 34 / outside 36 mm)
1 insert with 15 edges (inside 35 / outside 36.5 mm)
1 insert with 12 edges (inside 35.5 / outside 39 mm)
1 insert with 15 edges (inside 36 / outside 38 mm)
1 insert with 15 edges (inside 37 / outside 40 mm)
1 insert with 15 edges (inside 38 / outside 40 mm)