A bomb arming safety pin, preserved with its original handwritten tag documenting a December 2, 1944 mission against the Blechhammer oil refineries in German-occupied Silesia, flown aboard the B-24 Liberator "White Sugar" at 23,500 feet in bitter sub-zero cold. Such pins, saved by aircrew as personal mementos, connect directly to the strategic Allied campaign to cripple Nazi Germany's synthetic fuel production. Project: 218198