Original German WWII Named Motorcycle Corps Unit Marked 0.5L Beer Stein - Ceramic with Pewter Lid Military Equipment There are a number of

There are a number of stereopticon pictures that show guard units armed with a mix of 1884 and 1888 rifles

Although this could possibly have been the original carriage for this barrel when in it's muzzle loading life since conversion the rear of the back end of the tube has been modified with a breech conversion somewhat shortening the overall original length resulting in the elevation gear no longer lining up with the repositioned rear attachment point

According to Mills's notes

We have only a small quantity

A website about his service can be found at this link

Original German WWII Named Motorcycle Corps Unit Marked 0.5L Beer Stein - Ceramic with Pewter Lid Military Equipment There are a number ofOriginal Item: One of a Kind. Perhaps no other collectible is so shrouded in myth, misinformation and mistaken identity as German regimental steins. These pieces have been steadily reproduced since the 1960s and most experts agree reproductions far outnumber authentic examples. Yet few buyers other than stein specialists know how to identify the fakes. The majority of authentic German regimental beer steins were produced between about 1890 and 1914.