Silver Hallmark Identification. Cigarette Case

[MUSTKNOW]

Any help welcome. I can find some similarity in research but the small “m” is the issue

[red6]

The maker is Smith & Bartlam Birmingham Makers Marks - S&-SA

[Bartholomew]

1917.
Silver Cigarette Case: Hallmarked Birmingham 1917 by Smith & Bartlam: Measuring 8cm x 5cm: Weight 54