[I need help Identifying this odd german hand tool!]

Someone suggested that it may be an independent brake handle for a steam locomotive. Some of the designs come close

[I need help Identifying this odd german hand tool!]

Hello all! 

I've had this tool now for about 5 years, picked it up from a gentleman who used to work on steam engines and trains for a living, he also had no idea what it was for. To me it's very fascinating. It has a couple markings, DRP (So I know it's German, pre 1945), there is a logo, but It's not clear, and a 1. If anyone has any idea please let me know, I've asked a few engineers and machinists but they were left as stumped as I. I appreciate any and all ideas and information. 

 

Thanks for reading!