Cheers, folks, that site is great - so much explanation on how to measure them.
Jessey, sadly I didn't get exactly what I was looking for but finally got an email back from Circle Y who told me that the saddle was made in 11/97 - figured that one out myself
it has semi qh bars (07) (08=fullqhb) and 'the middle number' indicates the style of seat - in this case it was an equitation seat. Unfortunately the writer didn't specify which set of numbers were the 'middle numbers'.........
Anyway, as I STILL haven't got anyone to measure my girl (fingers crossed for next Thursday at 7.30pm) I am no further forward as I haven't a clue what will fit her......besides I know a Circle Y saddle for sale that I REALLY love, that is just waiting for me (or I hope it still is)to get my backside into gear and get measurements!!)