In the last 60 years, has Slingerland ever changed the style of their standard streamline lugs and standard sticksaver rims? (Leaving out any of the weird stuff for special models they might have done.)
Are the lugs and rims dated on the lug or rim?
Are the shields from the middle 1950's (1955 to be exact) all metal engraving with no paint or is the shield metal with paint? If there is paint used on the shield, is the paint the standard black lacquer?
On the strainers, do the later model more expensive strainers mount the same way as the three point strainer using the same mounting holes as the three point strainer?