Rare Waterman's Ideal Fountain Pen Display Cabinet

Here is a rare Waterman's Ideal Fountain Pen glass and wood display case, with double doors at the rear, and a bottom rear drawer which would have contained stock. Beautiful Gold Lettering done on the inside of the glass front panel. I've included a scan of a period Waterman's advertising as well. This would have likely had a prominent place on the counter of a Stationary Store, or General Store. I'm guessing this is from the 1930s, but if anyone knows more information, please comment! Thanks for looking!