Accutron RR Approved 218
We have similar in the database with the date window, but have yet to find an advert narrowing down the variant. We normally categories this as the obvious. Accutron Railroad.
I'm sure that in time we'll be able to narrow that down to a variant model number.
Accutron Railroad works for me as well.
1969 Accutron Railroad
1969 Bulova Accutron Railroad