The data plate switch happened about mid way through the 1957 production which was May 1957. The large (early) data plate measures 4.125"x2.25".
The late one is a bit smaller # DP57L measuring 3.5"x1.75"
Water slide decal: soak for about 20 seconds, then slide off (see video)
Black/clear
Data plate rivets order kit# 800
Video Clip | 