I came across this X410 on Ebay a few weeks back, sadly no date or model number stamped on this one. Sorry for all the pictures but the inside workings of these lamps is what keeps me interested. She didn't quite look like this when I got her. As you can see she was not very well kept and in need of a good home, this became very apparent upon disassembly. I will never leave paraffin in a lamp again. No lower pip on this one, the "plastic" fuel tube screws into the cock and the filter screws onto the bottom. I believe the pump is the short model used on the iron. The vent is also different than I've seen, the 182 globe latches above the rim and is held in place by a screw. Looks like the mud wasps had a fine home for a while too. I had hoped that the plated tank would cleanup but time and the elements had gotten the better of her. With more than 50% of the finish already gone I had no other option than to strip it down and paint it. Four different colors of metallic brass and I found one I can live with. Couldn't really leave it plain brass now could I? I added a 164X mantle as the two air tube burner housing was larger than the 191 mantles I keep on hand. The mantle filled out nicely and she gives a very good light.