1943 Service Lighter structure finalized;

1944 officially launched:

• Early version: Base engravingPAT. PEND. (Patent Pending), which is the version in your hands, production interval1944–1947；

• Formal grant of US patent 1947 in the United States;1947–1948 Late BatchesBase engraving cancelled PAT.PEND; official US patent number engraved.

  Positioning: Targeted at U.S. military personnel, overseas troops, and civilian outdoor enthusiasts. Competes with contemporaries like IMCO and Park Sherman military-grade lighters.

  Stainless steel body with rust and wind resistance, side-mounted independent flint tube, and one-click semi-auto ignition—ideal for field use.