Does anybody know what font this is?
Thanks

I don't know this one - but if you need something with the same feeling (not the same) Harold's Fonts has Artistamp and Charter Stamp... maybe one will do the job for you.

http://www.haroldsfonts.com/frontpage.html (on the side panel click on rubber stamp - it will get you there a lot faster...)

Apart from the first letter and the R, also similar is the OPTIDanley-Medium. Deformations were added later, see the differences in the s and s.