I really don't know what to make of this one at all, I'm sorry - I'd need to get my mitts on it.
However, in the early days, the Boffos made jugs and animals in their own time, which they sold in Valetta.
Also in the earlier days, how a piece was finished was very random indeed. To start off with, they did not have their own polishing equipment, it had to be taken to a polisher in town. They were incredibly busy, finding it hard to keep up with orders, and when and how something was finished depended very much on staff being available to do it after they got their own equipment, or to take it to town beforehand.
I do think though, that most of the snails I've seen are later than the Harris and Boffo period - they tend to have the splodgy enamels.