Julie Cartwright Antiques has dated this piece to the 1930s.
The base raised on three claw feet. The detachable section holding the wick hallmarked and the removable taper with flame finial.

Hallmarks
C&Co for Collingwood & Co.
London Assay Mark
Duty Mark.
Date letter "p" for 1930.
Lion Passant.
Dimensions:
Length: 11 cm / 4.2 inches.
Maximum diameter: 7cm / 2.6 inches.
Height to the top of the handle: 7cm / 3 inches

Weight: 198g - 7oz.
Ciondiiton:
Good.
All pieces present and matching.
One side of the reservoir with slight dent/dimple. See last image
Postage:
PLEASE DO NOT FORGET TO ADD POSTAGE AT CHECKOUT.
Postage UK: £8.00 Special Delivery Next day.

Postage overseas: £25 International Signed For.
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Julie Cartwright Antiques has dated this piece to the 1930s.
You can view the stock and full dealer information on the Julie Cartwright Antiques Profile Page