Original German WWII DAK Afrikakorps 1941 dated Souvenir Engraved Ring Technical Books we found a nearly identical

we found a nearly identical jacket in the Imperial War Museum of the UK which can be seen at this link

The Bowers' data on changes for the Douglas production doesn't include anything after the -55 production so it doesn't answer that question

Delay en route October 3-19 to Lincoln assigned to 2nd Air force squadron “C”- Lincoln A

The original ribbon is still folded

It is also marked with serial number 263

Original German WWII DAK Afrikakorps 1941 dated Souvenir Engraved Ring Technical Books we found a nearly identicalOriginal Item: One of a kind. This is a very nice German WWII Souvenir Ring from the North African campaign. It measures about 18mm in diameter, and looks to be made of Silver or Nickel alloy. The ring has a silver plaque on the top showing the German Afrikakorps Logo; a Palm Tree with Swas (Swas). On either side it is engraved DAK and 1941. The sides of the ring show a palm tree and a tent. A wonderful piece of German WWII Militaria! The Afrika Korps