E. Vernon Hill Borozin A.C. Gun Smoke Kit Air Current Tester Vintage Wood Box

Before digital airflow meters, technicians used a smoke gun to see which way air was moving. A squeeze of the bulb sends out a puff of dense white powder 'smoke' that shows drafts, ventilation patterns and air currents. This is the Borozin A.C. Gun kit, labeled E. Vernon Hill & Co., and it would suit collectors of HVAC, laboratory and scientific instruments or anyone who likes a curious piece of workshop history on a shelf.

Details

• The kit comes in its original fitted wooden box with box-jointed corners, metal hinges and a latch.
• Inside are the chrome-plated barrel with knurled caps and thumb screw, the red rubber squeeze bulb, a glass jar of A.C. Gun powder labeled 'Borozin or Zinc Stearate' with a black screw lid, a paper refill packet, and the printed 'The Borozin A.C. Gun' instruction card in the lid.
• The card carries a pasted-on E. Vernon Hill & Co., Lake Geneva, Wis. label.
• Weight is about 1.4 lb.

Condition: Good, with light toning to the instruction card, some loose powder dust around the contents, and oxidation on the latch and hinge hardware. No cracks, chips or breaks seen on the box, barrel or jar — see photos.

Please note: Smoke function not tested.

The photos are part of the description. Packed with care and shipped promptly!