Before I got excited, I'd contact Schmidt and Bender.
Very unusual to find a Euro scope with no markings at all.
The sticker implies it is a 2-10X variable, is it ?
Is the label on the ocular or objective end (all S&Bs markings are on the ocular end) ?
This fellow sells on Ebay:
http://www.ebay.com/itm/Vintage-GER..._DefaultDomain_0&hash=item19fc2718b6I have bought several scopes (including the 6X42 S&B) from him and all were 100% as represented. He might be able to help you ID what you have.
best, Larry