Twist bulb, barrel reservoir

Wahl Oxford made a twist style bulb filler. The barrel is a single piece of translucent celluloid. The filler has an O ring and a sac to seal the reservoir space from the filling system space. The bulb is capped off with a red knob that has a limited rotation of about 300 degrees. The full patent number is on the barrel, and the patent has a link below.

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