How to identify a lamp - general pointers using the lamp pictured as an example.
Note staple is large and ‘solid’ looking.
Top comes off, and gauze is single, so this is a bonneted Clanny type. Later bonnets would have pressed sections (usually when made in Lancashire). This hasn’t, but it is early. Cookes had thinner bonnets with no rivets on seams.
Don’t forget the marks. A D type mark is indicative of Richard Johnson Claphom Morris. Tiny numbers can point to Cooke of Birmingham. Starbusts indicate E.T and W
Number and thickness of bars (also known as wires or pillars). If they are thin this suggests an earlier lamp.
Type of bottom - if solid this is indicative of Lancashire maker. Also note the depth of the ridge on the base. If brass is very ‘white’ this