Now that is interesting! After getting my 214 last year I haven't really paid much attention to the 218 variations. I don't believe Bulova ever had the 218 models officially certified for RR use as were the 214s.
Maybe not officially but they sure got a lot of mileage with the 218/219 calibers before
moving into the pure quartz movements with the RR style dials...
My RR example is an N6, red 13 to 24 numbers, caliber 2181. It has the RR fully spelled
out on the face under the hands (RAILROAD APPROVED) and a red sweep...
I suspect some of the so called RR offerings on ePay are conversions, like the 214 space
views, because of the higher turnover pricing asked & offered/received for these specialty
Oh, as for the OP's question up there in Chuglak, Yes, I've seen the example that you
state (0 subbed for 24, 12 being on the inner circle numbers) offered on the Bay.
It could be a European thing with the 0 in place of the 24 (NOT the 12). In the GMT/Universal
24 hour system, if I remember correctly, one minuet past midnight is recorded as 0001.
One AM is written as 0100...
If you look at the example quoted as Canadian, you will see that dial is Swiss. I don't think
the US RR's will have the 0 in place of 24.
By the by, I spent a year in Galena, back in '59...