This is from the 'normal' mold for the Spratt//Patent//1850 LRI. Note that "Patent" is in the front side, over the tab. This one is particularly bubbly! It is a tall one, being right at 2" tall. These normally are about 1 3/4" tall. I call these 'normal' style (the 1 3/4" ones) because these seem the easiest to locate around the hobby. Purchased in September 1993.