I just got this lovely repousse silver plated coffee pot and although I’ve done extensive searching I can’t find who the maker is… the makers mark appears to be slightly miss stamped, so I can’t make out the first 2 letters, only the ‘BP’… any ideas/guesses would be much appreciated!
It’s very well made, with ivory insulators on the handle… it was listed as ‘Early Victorian’, does this sound correct? Can anyone add a more accurate date??
Many thanks folks…
The lettering appears to me to be INBP where BP is almost certainly Britannia Plate (electroplate on Britannia metal). IN are probably the manufacturer’s initials, maybe John Nowill of Sheffield. The mark certainly doesn’t appear in any of the usual electroplate identifying sites.
Thank you… that confirms the first letter is certainly a Gothic ‘i’ and maybe followed by a ‘k’? I’ll carry out more searches for those initials!
Thank you for your thoughts… I guessed with the BP being a slightly different font it was probably Britannia Plate. I’ll try following up with searching makers with initials: IR, IK, IN… 
The answer to your headline question is, no, not so far. The answer to your text question as to accurate date, again no, but probably third quarter of 19th century based on best evidence to date.
With the development of electroplating with silver in 1846, Britannia metal was frequently employed as the base metal for silver-plated household goods and cutlery. The abbreviation EPBM on such items denotes “electroplated Britannia metal”.
Britannia metal, aka nickel silver was generally used as a cheaper alternative to electroplated nickel silver or EPNS, which is more durable. Your abbreviation INBM appears to be a single composite rather than the combination of two ideas, a maker IN and a metal content BM. But what appears and what is when it comes to gothic lettering designed specifically to beguile the casual Victorian observer/buyer is very often very different.
Which is why one might plumb for a date sometime in the latter part of the 19th century, probably the last quarter.
You could do a composite test for nickel silver which would go a long way to answering the question as to what BM stands for.
Because this is an unregistered trademark not a registered mark, other than private websites, which have already been competently scoured by your good self and two very able researchers, and some rather haphazard printed lists, there is nowhere to look up plate marks.
I take it everybody is presuming this is British and probably Hallamshire because of the British Lion rampart which would be a badge for the buyer probably pre stamped rather than custom inscribed? This is likely an accurate assumption.
If, Phil, www.silvermakersmark.co.uk is right, and he usually is, and the first two letters are for John Nowill, a cutler first established by the grant of a D trademark in Hallamshire about 1700, then that company’s records will show your mark (It was indeed involved in plate manufacture although mostly as it pertained to its core business cutlery.)
On the subject of slightly deceptive marks, in 1850 Nowill was charged with infringing trademark by selling knives marked ‘J. Rodgers & Sons’. Nowill’s defence would have to have been that counterfeiting trademarks was relatively common in the nineteenth century. Never a good defence in the criminal courts and apparently no more useful defending a trade mark infringement application. The company settled out of court.
Jack Adams Ltd of Sheffield was the last recorded recipient of Nowill’s records and he has passed on.
But his executors may be able to help.
CRWW
Thank you Christopher, for your illuminating insights! I was keen to know more about the lion family crest, but didn’t want to impose too much.
I’ve now researched the maker’s mark suggestions, but sadly suspect this will be yet another unresolved mystery… just so frustrating and deflating.
But I really do appreciate all the help this forum supplies! 
Thank you… yes, it does appear to be the letter ‘R’… but still no luck trying to locate a UK producer with those initials… 
The crest only matches one rampant lion in Fairbairn’s book. Regretfully it is associated with 24 family names.
Fairbairn’s book does show the lion in your links (13), and does associate it with Wilson…but, that lion is also associated with numerous other families. I stopped counting at 100. I feel the lion marked 10 in the pic below is a closer match to the engraved crest.
Thanks for the correction. Good job, Andreas! 
Thanks for looking into this… I quite agree that these are the correct Lion Rampant crests… pity it wasn’t a rare one like a prancing fox!
https://www.reddit.com/r/heraldry/comments/u92qsk/roast_the_arms_i_designed_for_my_father/
Took a look through Fairbairns for a dancing fox or even a fox rampant but came up crickets.
The British apparently like their foxes “passant” or sometimes “sejant”.
However did come up with this one!
CRWW
…maybe I’ll make that into my new faux family crest! 
