Slipware jug ? Cb mark

A fairly run of the mill slipware jug . 18cm high. Anyone have any ideas on the mark??( apologies for poor focusing)

Had a thought . Could it be Wetheriggs? Seen several images of jugs etc with this design - although I realise it may be quite a popular way of slip decoration.
The marks for Wetheriggs that I've seen are not like this but with some hope the mark could be a 'W' ??

It's possible.
There was Hans Christian Ullrich at Wetheriggs but I think he just used an Ullich stamp.

Yes . In the 'book' it appears the marks were always incised/ impressed on base , not at base of handles and no obvious use of initials or moograms

Found a couple more examples on slipware plant pots . Looks like a W or 3