This set of 2 stainless steel watch spring bars will fit Omega Seamaster Chrono Diver models with bracelets using clasps stamped 1504/826, including model 2221.80.00 and similar. These bars are used to attach the bracelet to the watch case.
These were not made by Omega but are high quality compatible parts.
If you are not sure if this will fit your watch or if you have any other questions, feel free to email me at Sales@TheWatchLink.co.uk. I'm happy to help!