Has to be a limited edition mark. That's all I can think of.
Here's t'other one. I had to get it out of the loft. No numbers.
I thought of decorators and retailers, as well as potters. Can't find anything as yet. I even thought that Liam Brady and Joe Jordan might have opened an arty-farty boutique together, except they were never on footy teams in the same part of the country :-)
Mebbe need to find a Scouse trading (or phone) directory from the 60s.