I assume you don’t like the Fauxtina on the ‘57 reissue? I know many think they went too far (myself included) and wish there was a Fauxtina/non Fauxtina option like Nivada does currently.
But as mentioned above, you will devalue the watch by altering it- if that’s an issue for you. If you know that going in and want to do the lume color change for you alone and don’t care about value- then I vote for a pale yellow like you show above obviously.
If you like the look of the Railmaster style and want lighter color lume (and don’t care if it’s an omega or not), I say sell the Railmaster as is and buy one of these
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https://nivadagrenchenofficial.com/products/super-antarctic-91412aClick to expand...