Please help me with the Omega reference number for the correct 20mm spring bars on Seamster 300 166.0324 (WatchCo). I saw on Ofrei it named OME-SPRING-BAR-03, but I want to buy form Omega service in EU. Just wanted to put a nice leather nato on my pre-owned SM300 and saw one spring bar is shorter (about 18mm) and not in a good shape. So want to replace them. I got 068ST2208 to use with leather straps my Speedmaster 3570.50.00, but they seems way too thick for 1171 bracelet. I think leather nato will benefit from thin spring bars as well.. Thanks!