I bid on a lot of lower grade 1860,61 and 74 bunheads on ebay ,in the hope that I can pick up some of the variations I don't have on the cheap . As expected , I normally pick up a lot of the commoner ones (that I already have ) .3 of my latest ones are ,I think are F24, F28 and F32 .Although I am unsure of the F28 ,its corroded and Its maybe a bit of wishful thinking . I am normally quite confident of working out the combinations , but getting 3 scarcer ones in one go has got me second guessing .