IMPERIAL GERMAN RINGS AS WORN BY THE BOCHE DURING THE GREAT WAR:

US KOREAN WAR ERA? AIRFORCE ISSUE “INDICATOR ASSEM-COLD-CYLINDER, A.F. PART NO. 53D31539-TYPE A-1-A”, USED TO TEST TEMPERATURE IN ROTARY ENGINES, C/W ORIGINAL CRACKLE FINISH METAL CASE, NEEDS CLEANING TO VG+, LOOKS COMPLETE