BRITISH COINS FROM OTHER PROPERTIES, Miscellaneous Trials and Proving Pieces, Plating Trial, c. 1970, in conjunction with the British Steel Corporation, in chromium-plated steel, crowned arms dividing Tower Mint logo and a rose, royal mint on banner below, trial to left of crown, rev. hour-glass shaped flask, b s c to left, c r 17 to right, edge grained, 23mm, 4.96g/12h. Some scratches on reverse and has been cleaned, about very fine and extremely rare; no others believed extant outside the Royal Mint (£30-50)

Provenance:
DNW Auction 36, 12 June 1998, lot 178
Joanna Tansley Collection, DNW Auction 67, 28 September 2005, lot 475.

The British Steel Corporation was formed in July 1967. It was privatised in 1988 and merged with Koninklijke Hoogovens to form Corus in 1999. The cr on the reverse indicates chrome