Antique XIX/XX century signed leather wallet

Could you please help me to estimate value of my late XIXth/early XXth century leather wallet. It was produced by Albert Rosenhain's specialty store for luxury goods at the turn of the century. The store was based in Berlin, closed before World War II due to German policy regarding Jewish community in the 3rh Reich.

On ebay I found a couple of Rosenhain's advertisments from that period, there are wallets similar to the one that I have, but none of these looked exactly the same.

Some of Alebert Rosenhain's works you can see in Jewish Museum in Berlin.

Please take a look at the photos and help me estimate the value of this antique.

Edit: apparently there should be 2 initial letters on the front of the wallet, the second one is lacking.

Fair