Finally, a sunny spring day here! Inspired by @Alpha to try a brown strap on my silver/opaline AT. YaY! Not bad...although I think I will be on the look-out a lighter honey color too! I believe Isofrane keepers should be arranged this way, such that the angled keeper aligns with the strap's tip.
Good eye! 1923 Illinois Bunn 19j motor barrel..... proof you don't need 21 jewels for railroad accuracy!