well, you live and learn as they say...... nice jug - bet a pair would look nice

not beyond the bounds of possibility that - subsequent to manufacture - a later date might be added in celebration of some event - thus giving the appearance that the date we see was the date of manufacture - the opposite in fact of something deliberately fraudulent, where the intention is to deceive by providing a date earlier than when the piece was made.
I think the former variety happened with tumblers/drinking glasses etc. for Christenings and marriages and the like, and I notice that there is an inscription on this jug, which appears to be celebrating some event which presumably occurred in 1931 - or maybe the anniversary of some event was that year.
Could be wrong, but I don't feel entirely happy going with the idea that this jug was made in that year. Chris, what is the full wording, please.