I do I tell a Mans watch band from a Ladies watch band I have come a cross several dozen Omega stamped watch bands. Many of them taper from 18mm to 16mm, 18mm to 14mm, 17mm to 14mm, 16mm to 14mm etc for example No.5: 23mm X 16mm. No.11 16mm X 14mm 1. When did Omega Start using tapered band on Men's watches? 2. When where straight bands used? 3.Which buckles where used and in what decades? If you care to take a guess as to which straps out men's and which our women's. Please feel free... Most of the ads I seen that are from 30's & 40's have used Buckle A with straight straps. I assume buckle B was used later in the 50's to early 70's, where I start to see tapered straps. Any comments, help or suggestions are greatly appreciated.