Those certainly look similar to mine don't they. I'm always surprised by how spiny many of these species were - more like pin cushions than the traditional idea of an ammonite.
I have to get myself an air abraider at some point!
Dagnabbit Andy/Andy, I got a Ken M. ST then an HD, two compressors now AndyS gets all abrasive !
Gonna have to really sweet talk Mrs. B. into this one !
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