Anybody going for the Freeman 23 at the next LCA? - can be seen here 11.32g toned UNC.
The Freeman 23 is an 1861, 4 + D, on a heavy flan, average weight 11.35g, compared to a general average of 9.45g. Thickness 2mm, compared to a general average of 1.5mm.
Just looking in Gouby, it appears that (as of 2009, at any rate) 7 were known. Three of those are in the British Museum, and the remaining four in private hands.
Of course, the price has gone up over the years. This time, LCA are looking for bids in the £5k to £6k parameter. The last one they sold in December 2012, went for £5,500 - which see. It'll be very interesting to see what this one fetches. Actually it appears to be the same specimen.
Other sales listed by Gouby are as follows:-
Christies - 23rd October 1984 (Freeman) EF 11.1g - £237.00
Spink -17th June 1987 (Norweb) pAS 11.3g - £648.00
Spink - 23rd July 2003 (Adams) pAS toned - £1117.00 (weight not given)
DNW - 20th June 2006 (Bamford) AU 11.32g - £1941.00
MR - December 2007 list pAS 11.02G - £1850.00
So an increase of 172% between 1987 and 2003, and an increase of approximately 290% between 2006/07 and 2012.
Clearly LCA are expecting the same ballpark bids this time as in 2012. We will see.
Given their condition, it's pretty obvious that none of these specimens have seen any circulation.