Vintage Copper Coloured Swivel / Wall Tin Oil Lamp

An attractive vintage copper coloured tin oil lamp, with handle, and on a swivel to allow it to be either paced on a flat surface or hung on the wall.
On the handle is an anchor mark, some words I can't make out and Shanghai, China.
It measures approx. 7 ½ inches, 19 cms., to the top of the chimney.
In good condition, with some wear to the copper finish. Could probably do with a good clean & polish.
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I am not an expert on oil lamps. Please take a good look at the photos, and if you have any questions please ask & I'll do my best to answer.