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I spray and go with my Shapton Pros it works well for me.

You are correct, I forgot about the M5s. I read somewhere they were the same as the Pros but I have not tried them to compare.

If it was a Shapton it would say so. There are two models Shapton has out, Glass and the Pro. none looks like this one.

Better pics will be very helpful in identifying what you got there.
Right now the only thing that this resembles is a 4/8k Norton.