Good call. Will see what I can find.
I can see on Ancestry a Frederick William Trombull b abt. 1873 baptized at South Shields, Durham, England 1873. Son of Margaret and Edwin Trombull. The money box was produced in Stockton on Tees which is just down the road. So you may well be right! I will keep looking.
An uncommon surname, cannot find much else so far!
The boxes were typically made for special events, births, baptisms and marriage.