Here's some quick research....

Don't know if it helps you or not, as these Mauser pistols are NOT my collecting field.

Click the links ....

Von Lengerke & Detmond Markings

47. Von Lengerke & Detmold Broomhandle 7.65mm sn 31208 $750.00

Simpsons Catalog

Gunbroker - Broomhandle Mauser Model 96 Von Lengerke & Detmold - Sold $1500

Regards,
Badger