American Time Watch Movement Sizes Gauge / Ruler

American Time Products watch movement size gauge / ruler.  One side is American Movement Sizes and the other side is Swiss Ligne and a Millimeter ruler, so this is a pretty handy tool.  Gold color aluminum gauge is in really good shape for the age.  I have a pile of these but this one is in the nicest condition of the ones I have. If I remember correctly these came in the package with Watch Master Timing machines made by American Time.  I could argue that this gauge has more value now that one of those machines does.  Anyhow, images do a satisfactory job of representing the item.