Above is a card published by Bamforth and postmarked 1975.
MON 16th JAN 2017 UPDATE: Below is the same Rhyl photo used on a differing card by Bamforth. The single-storey Coliseum Theatre is shown to better advantage in this version.
Bamforth & Co. Ltd of Yorkshire still exists. The company made 'saucy' seaside postcards from 1910 onwards; these are famous and collectable.
Less well known is that Bamforth made a series of short comedy & novelty films 1898-1915. You could find a list of them on Wikipedia: