Dating collection

04-Aug-2019 03:33

Hook (see below) points out that adding tin to copper results in an alloy that is harder than either copper or brass, although too much tin makes the medal more brittle. In this study Hook found variable amounts of several other metals in these tin- and zinc-copper alloys, including antimony, arsenic, bismuth, iron, nickel, lead and silver.

An area on the lower portion of many medals beneath a horizontal line that separates it from the principal design of the medal and which usually contains lettering or symbols related to the subject of the medal.This is why medals should never be cleaned, only gently washed with a mild detergent if absolutely necessary.Edge knocks, discoloration, corrosion, dents, scratches and any other disfigurements should all be mentioned.) These terms are self explanatory and describe medals which have been scarcely handled at all.Mint state or Uncirculated (Stempelglanz; Fleur de coin; Fior di conio; F. C.) These medals would have evidence of just the slightest handling.

An area on the lower portion of many medals beneath a horizontal line that separates it from the principal design of the medal and which usually contains lettering or symbols related to the subject of the medal.

This is why medals should never be cleaned, only gently washed with a mild detergent if absolutely necessary.

Edge knocks, discoloration, corrosion, dents, scratches and any other disfigurements should all be mentioned.

) These terms are self explanatory and describe medals which have been scarcely handled at all.

Mint state or Uncirculated (Stempelglanz; Fleur de coin; Fior di conio; F. C.) These medals would have evidence of just the slightest handling.

Many are made of copper alloys, the most common being: Bronze: an alloy consisting principally of copper with smaller amounts of tin, and sometimes low levels of zinc, phosphorus, manganese, aluminum, silicon, lead or arsenic; Brass: an alloy consisting principally of copper with smaller amounts of zinc, and sometimes with very low levels of tin; Gunmetal: an alloy of copper with both tin and zinc.