Original German WWII Luftwaffe EM/NCO 1939 Dated Aluminum Belt Buckle by Friedrich Keller - LBA Marked Availability_International and once the correct sizing

and once the correct sizing was achieved

a size 66 helmet shell can fit up to a size US 7 3/4 hat-size

There are some additional ink markings

Things continued that way for several decades

Original German WWII Luftwaffe EM/NCO 1939 Dated Aluminum Belt Buckle by Friedrich Keller - LBA Marked Availability_International and once the correct sizingOriginal Item: Only One Available. This is a very nice WWII German Wehrmacht Luftwaffe EM NCO's Belt Buckle (Koppelschlo). It is embossed with the wartime Luftwaffe straight tail eagle inside a laurel leaf wreath. Nice aluminum construction box buckle with a pebbled background. The buckle is in very good condition, with the pebbling in good condition, and most of the detail in the eagle present. The buckle is clearly marked on the back by the loop F.