I agree with M Eley, these are likely a non-military type (as in not an Army / Navy pattern) that were used by a multitude of para-military organisations.
The Royal Armouries have in their collection a case of weapons that features muskets with bayonets, pistols and sabres that are a close resemblance to this type, made by Woolley & Sargent and Co.
https://collections.royalarmouries.o...ect-47163.html
I have read previously that these were also sold to property owners to equip their security with, alas I can’t find the source.