Two Pounds 1887 Pattern from Proof dies - a very rare trial piece

Two Pounds 1887 Pattern from Proof dies - a very rare trial piece struck from a unique Obv. die. The legend arrangement is similar to the standard proof dies, but the 'BRITT' is now at its highest known point above the crown and the 'R' and 'E' of 'Reg' do not touch as all other 1887 Two pounds. The crown supporter has 8 small pearls, not 7 larger ones as other proofs and currencies. This coin has a unique thin Obv. rim, with the bust now enlarged to accommodate this feature, whereas the Reverse still has the usual and inconsistent thick rim. An unpublished pattern struck from proof dies with only a few examples previously noted, NEF with contact marks

Estimate: 850-950 GBP