Vintage Angel Christmas Tree Topper Angel Pig Tail Light

Great vintage condition. Minor signs of wear/age shown in pics. Yellow discolouration inside, I don’t smell smoke and I don’t see any liquid stains so I’m not sure what the discolouration is from. See close ups. Measurements in pics. Please look at all pics and zoom in for a closer view. I am unable to test it as I don’t have any Christmas lights. Vintage Angel Christmas Tree Topper Angel Pig Tail Light