Welcome jguiles.
Late 1950s small stamp I'd say. Here's why:
http://black.net.nz/avedis/avedis-gallery.html#small
In addition, the inked HI HAT on the bottom of the one on the right is in the tall thin style of ink which is another 30s to 50s thing. The shape of the letters changed in the 1960s (and again in later decades). Early ink (30s - 50s):
http://black.net.nz/avedis/avedis-gallery.html#first
60s ink (scroll down to see some ink):
http://black.net.nz/avedis/new-beats.html#NBtop
Those might be New Beats (bottom heavier than the top), or they might be about the same weight, or they could be some other pairing. I can tell you more if you tell me the weights.