Another Roamer back today as well.
This one has an interesting history I think.
The second hand is plainly not original however there is a name inscription on the back which after a bit of sleuthing led me to the conclusion that the original owner is a well known photographer.
Back in the day when this was new ( late 60's)
As many of us know, photos were not digital and required a dark room to develope the negatives and prints but it was all dependent on timing with precise timing for time in solution etc ( been there done that).
Roamer Mustang Indianapolis watches of this reference don't have luminous hands at all so they have been changed out, definitely the hour and minute hands are Roamer but that critical to the process of photographic developing second hand I am not so sure but it is a big luminous hand as befits it usage.
Mystery solved! All thanks to an inscription.
I have been of late buying a few watches with inscriptions on them and have a wonderful time researching their original owners sometimes like in this case success but other times not however persistent searching will 9 out of 10 times yield a result if the inscription is suitably detailed.