SOLAR RADIOMETER, CROOKES, LIGHTMILL - Clear over all with Math Formula

Description

SOLAR RADIOMETER - Clear over all with Math Formula in black
Variety:  Standing type
Globe diameter: 3 inches
Height: 7 inches
Made in Germany by high quality standard
Shipped from Las Vegas
Each may very slightly differ due to being handmade.
Note: Formulas are hand painted and the painters had fun painting them, it seems. There are several formulas that appear always on each globe but some may have extra formulas. The "angle" of painting may be different - that is some are tilted, some are more horizontal. The "size" of letters or brush strokes may be different. What I will send you is NOT what's in the picture, but overall "feel" will be the same as pictured.
-L624-
Before I box it, I will test it to make sure it runs.  If not running, I have to cancel the sale. Usually I put it under 60W lamp and it runs but very slowly. 100W is a bit better and under the sun, it should run good. Now, when you get it and try to decide WHERE to hang/place this, make sure it will get enough brightness - lumen - to turn it. Even if you think the place is bright enough, say, next to the picture window, it may not run because the area does not have enough lumen. So, try it around the house.   Thanks.