Struggling here. There aren't many sceptre shillings listed. 1949 and the surrounding years saw two examples which appear to have stayed in the trays for a while. One less than fine for 8/- to 10/6 and a gFine to nVF at 21/-. However, neither had stock numbers that were remotely like the above. TBH, without knowing what the coin was and its grade, there's a fair amount of p***ing in the wind. Fair Tower shillings were still selling for 6/- in 1960, so it could be any time over a 20 year period. Unfortunately I'm missing 2 issues in the 1940-1960 period, so a complete check wasn't possible. Sorry.