Julie Cartwright Antiques has dated this piece to the 1920s.
The magnifying glass mounted with a 5cm diameter steel mount inset with magnifying glass. The letter opener with a 12cm stainless steel blade.

Hallmarks:
B&Co for W I Broadway & Co.
Birmingham Assay mark.
Lion Passant.
Date letters "D" for 1929.
Condition:
Very good.
Handle in excellent condition on magnifying glass.
Glass with no surface scratching.

No loss to the enamel.
Dimensions:
Magnifying glass: Length 13.5cm / 5.2 inches.
Glass diameter: 4 cm / 2inches.
Letter opener: Length 20cm / 8 inches.
Postage:
PLEASE DO NOT FORGET TO ADD POSTAGE AT CHECKOUT.

Postage UK: £5 Royal Mail Tracked 24.
Postage overseas: £25 International Signed For.
Postage USA (including US import duties): £45.00
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Julie Cartwright Antiques has dated this piece to the 1920s.
You can view the stock and full dealer information on the Julie Cartwright Antiques Profile Page