. . . with 172 end links. The one I just sourced was originally fitted to f300 Seamasters, but fits a Flightmaster perfectly. It had some wear and tear, and the price was reasonable, so I thought, "Finding 155 end links for my 1159 has proved to be impossible. I've missed a few complete 1159 bracelets over the years. Why not go for this substitute?"
Of course, if I ever find the right end links, I'll snap 'em up in a second and have the 1159 fitted in a flash!