The model 2 lamp underwent a number of changes during it's one year production cycle. First was the new table font with the ribbing at the bottom of the bowl along with a burner that eliminated the stop screw on the wick adjuster shaft. This version still used the model 2 gallery and generator.

Next came the model 3 gallery and generator. This is the version usually acknowledged as the 2-3 transition lamp.

The Kone Kap mantle was a major improvement over the earlier Cap mantle. The Kone Kap mantle, number 3 gallery and flame spreader were patented by Aladdin which now gave the company complete control over the manufacture and sales of all their lamp parts.

The model 2-3 transition burner used the model 1-2 burner base and simplified the wick raiser arm that was put into production before the Kone Kap mantle was available.

The top flange on the outer wick tube is formed. The flange on the original model 2 burner style was a separate piece held in by dimples.

The air distributor is a two piece screen forming a concave cone. On this burner you can see a ridge in the outer wick tube. I believe this is where the tooling clamped onto the tube to hold it whist forming the top flange. This ridge seems to be unique to the transition burner.

This lamp uses the model 3 generator and gallery. The wick carrier is the same as used on the model 1 and 2.

The quick diagnostic for a very late model 2 and the 2-3 transition lamp is an early slotted burner pattern with an offset wick raiser and no set screw stop.

This is the new model 3 gallery. Earlier galleries had a built in cone that the the Cap mantle fit over. The new Kone Kap mantle came with its own cone. All it need from the gallery was a ridge at the opening to center it and some raised flanges to lock it into place.

The number 3 gallery found on the transition lamps has international patent dates stamped into the side.

The gallery was stamped:"MODEL No. 3 PAT. USA MAR. 14, '11, APR. 4, '11" and 1/3rd away around the gallery: "CANADA JAN. 10, '11, BELGIUM SEPT. 1, '11" Then about 1/3rd around the gallery: FRANCE OCT. 28, '10 OTHER PATS PENDING"

The transition lamp used the model 3 generator.

This is the 2 piece air distributor that came with the late style model 2 burner used on the transition lamp. It is unique in that the outer flange and end flanges are bent in opposite directions. Later two part screen air distributors had all the flanges bent in the same direction. This provided better locking of the parts.

The air distributor placed in the concave position. The side flanges point down but the distributor's outer circumference flange points up.

The halves are not locked solidly in place and are subject to falling out when inverted.

The threads on the late model 2 and transition lamp are no longer visible when a burner is installed. Instead off a visible rolled thread there is now a threaded insert inside a smooth neck.

This lamp used fine threads like the model 1 and early model 2 (Uses the same basic burner base). Model 3 and later used a coarser thread. This means a model 1 or early 2 burner could fit on this font but not a model 3 or later burner.

The transition lamp uses the late model 2 table font.

Transition lamp on the left and early model 2 lamp on the right. The external threads on the early model 2 makes it easy to tell between these two.

Another diagnostic between the early model 2 and a transition lamp is on the underside of the bowl. The early model 2 bowl is smooth while the transition lamp has radial ribbing that it shares with models 3 through 6.

Model 3 font on the left and transition font on the right. The same table fonts were used in models 3 through 6. They look like the transition font except for the chimes that lock the top of the bowl to the bottom. Models 1, 2 and the transition have a narrow chime. Models three through 6 have a wider chime. By themselves the earlier chimes look more pointy and the later chimes more boxy in profile.

Also the threads change between the transition and earlier fonts and the 3 through 6 fonts. Burners across this line will not willingly screw into a font on the other side of the line.

The shade holder used on the model 2-3 transition Aladdin lamp was a generic Plume & Atwood shade holder. The table lamps used the rectangular cross section shade holder shown on the left. There are metal sliders on each arm. The sliders are moved out, the shade holder mounted to the base of the gallery and he sliders moved back in to lock the shade holder into place.

Parlor lamps used a different generic P&A shade holder that had straight arms that went out to a shade support ring. Ring shade supports were used in model 1 through 4 parlor lamps then bought back for model 23 table lamps.

Aladdin model 1 through 6 used a filler cap with a flower pattern on top. There were two varieties, vented, with a hole in the centre top and unvented.

Models 1 through early 5 lamps with slotted burners used the vented cap.  late model 5 and model 6 screen burners used the non vented type.