and pieces of that research over the years. have to buy the book very soon ! yeah, the railmaster prototypes are very interesting. omega experimented with different dial fonts, as you see in your article. i had at least 3 different dial fonts from the first series and even the second series had unusual dial variants; like the railmaster for the pakistani airforce. factory confirmed. i bought a white railmaster as well. different dial font and the black hands from the mil 1953. lume turned brown and is still original in the hands. the case is a plain 2777 and has fixed bars. the side profile is not the same as the mil 1953 ( or your white dial railmaster), but closer to the final railmaster case. movement production late 1953; same caliber without swan neck. we restored the case and left the other parts untouched. that case will be another variant in the railmaster history. kind regards from australia. achim