Help with unidentified Sponsor/Importer mark on a Dunhill silver cigarette case

[razmaztaz88]

The cigarette case is signed ALFRED DUNHILL LONDON, and is decorated in Japanese lacquer. It is stamped with the French Boar’s Head mark (for silver guarantee of small items). However, there is no indication of a French Maker’s Mark (in a typical diamond shield). There are UK hallmarks present: Leo constellation (for imported wares into London), .925 in oval shield for silver standard, and the date letter l (small ‘L’) for 1926-1927. There is a further mark, which looks to me to be C.F (?) alongside the other UK marks which may be the UK importer’s mark. The marks are not well defined because the inside of the case is finished in a textured black lacquer, which makes precise imprinting difficult. I am confident of the three UK hallmarks (Leo, .925, and date letter) but unsure of the fourth mark (C.F ?). Any help, comments, or opinions greatly appreciated please.