Here is my collection of true half-extents of Grandsire Doubles. As for the other parts of my collection, four calls are used - bob (b), single (s), extreme (e) and bingle (g) along with plain leads (p).

Sixties are often used to create a Quarter Peal of 1260-changes in length, or to fill a few minutes at the end of a practice or before Sunday Service.

There are 15 possible callings, 69 touches with rotations. Of these, only two callings (5 touches) use conventional calls. Did you know there was a two-parter?

 3 60 pbpbpb
 2 60 sbpsbp

 3 60 sesese
 3 60 gegege

 2 60 ppgppg
 2 60 pebpeb

 1 60 sesbep
 1 60 sepgbe
 1 60 sebpge
 1 60 sebgep
 1 60 ppepgb
 1 60 ppebpg
 1 60 pgbepb
 1 60 pepegg
 1 60 pegebe