Postby silvermakersmarks » Sat Nov 28, 2015 3:11 am
It's JF, which is the mark of John Fleckner, a specialist watch case maker, whose address in 1873 was 38 Mount Street, Chapel Fields, Coventry. This mark was registered at the Chester Assay Office on 2 Feb 1870. This mark was also registered at the London Assay Office on 24 Jan 1870.
Phil