it looks to me like you have: a nice looking steel frame with a 1" (one inch) steerer tube on the fork. the silver "shim" on the steerer is for using a 1 1/8" stem on the 1" steerer. and the seller supplied a 1 1/8" cap. the seller likely supplied the shim and cap since 1 1/8" stems are more common than 1" these days
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk