Tall Lincoln drape lamps were sold for 10 years. They were available in clear, Alicite, cobalt blue and ruby red. Only a very small number of clear lamps were ever made and they may never have gone into the normal sales channels. The alicite lamp on the other hand was Aladdin's best selling lamp almost every year of production.

Over the years several molds were used to make the lamps and there was often a lot of variation among the molds. One mold had a scalloped pattern on the foot, which, because of its rarity has become sought after by collectors

The original formula for Alicite included uranium oxide as a white pigment. Lamps using the original formula fluoresce when exposed to a black light. Early in WWII uranium became a restricted war material and the formula was changed. Thus only the first three years of production used uranium oxide. Collectors tend to prize "old formula" lamps over "new formula lamps" once again because there are fewer in existence.

The Alicite, blue and red lamps came with brass burners. Only the last year of production came with Nashville burners.

The tall lincoln drape lamp has been reproduced for several years and there may be more reproduction red and cobalt tall Lincoln drape lamps than Aladdin ever made. Reproductions have been seen in clear, red, blue and amber (Aladdin never made any in amber).

There are numerous variations in foot pattern and height. It would be difficult to tell a reproduction just on the foot pattern alone. The best diagnostic I know of is the filler cap. Original lamps have a greater angle than reproductions. When I collected tall Lincoln drape lamps I kept a real one and a reproduction side by side on display as a continual reminder of the differences.

These pictures show the scalloped pattern on the base of the scallop foot lamp. Alicite, blue and red lamps were made from the scallop mold.

This is what the old formula alicite looks like when lit by a black light. Some collectors searching out old formula alicite carry portable black lights with them when they go antiquing.

The clear, ruby and cobalt lamps have been reproduced  for some time and a number of different molds have been used to make the reproductions as well as the Aladdin originals.  This means there are a lot of variations in each.  So far the scallop foot version has not been reproduced nor has the alacite.

The single best feature I have found to tell an original from a reproduction is the tilt of the filler cap.  The picture is an original Aladdin tall lincoln drape lamp.  Notice the angle on the filler.  Every reproduction I have seen to date has a level filler or just a slight tilt.