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Davis Single Shot
  Davis Instruments Model 00 Single Shot Blaster Permissible Tag Side.JPG - DAVIS INSTRUMENTS MODEL 00 SINGLE-SHOTBLASTING UNIT- Rare cylindrical single-shot blaster, brass body with handle attached by leather strap, 6 1/4 in. high and 1 5/8 in. dia., one side marked with oval DUPONT tag and other side marked with plate marked PERMISSIBLE SINGLE SHOT BLASTING UNIT APPROVALNO. 1203 ISSUED TO DAVIS INSTRUMENT MFG. CO. INC. and Bureau of Mines logo, other marking notes “Not permissible unless used with rubber coveredleading wires of lengths not exceeding 600 feet of No. 14, 350 feet of No. 16, or 200 feet of No. 18 wire.” Screw on brass bottom marked with incused stamping around edge of Davis Instrument Mfg. Co. Baltimore MD, ex-John Podgurskicollection [This is one of the very earliest single-shot blasting units approvedby the Bureau of Mines.  Approval was granted to the No. 00 spring-operated blaster on Oct. 17, 1924 and issued to the Davis Instrument Mfg. Co. Baltimore MD. This is one of two known examples in collections.]  
Davis Instruments Model 00 Single Shot Blaster Dupont Tag Side
Davis Instruments Model 00 Single Shot Blaster Top
Davis Instruments Model 00 Single Shot Blaster Bottom
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Davis Instruments Model 00 Single Shot Blaster Permissible Tag Side | DAVIS INSTRUMENTS MODEL 00 SINGLE-SHOTBLASTING UNIT- Rare cylindrical single-shot blaster, brass body with handle attached by leather strap, 6 1/4 in. high and 1 5/8 in. dia., one side marked with oval DUPONT tag and other side marked with plate marked PERMISSIBLE SINGLE SHOT BLASTING UNIT APPROVAL NO. 1203 ISSUED TO DAVIS INSTRUMENT MFG. CO. INC. and Bureau of Mines logo, other marking notes “Not permissible unless used with rubber covered leading wires of lengths not exceeding 600 feet of No. 14, 350 feet of No. 16, or 200 feet of No. 18 wire.” Screw on brass bottom marked with incused stamping around edge of Davis Instrument Mfg. Co. Baltimore MD, ex-John Podgurski collection [This is one of the very earliest single-shot blasting units approved by the Bureau of Mines. Approval was granted to the No. 00 spring-operated blaster on Oct. 17, 1924 and issued to the Davis Instrument Mfg. Co. Baltimore MD. This is one of two known examples in collections.] Download Original Image
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