Something to note is the direction of the "finger" because some are in One o'clock and some are at Eleven o'clock.
Seb, I think your 15k88 might be the Eleven o'clock position, whereas the one Kelsie has is One o'clock.
There are lots of 15 class machines - one just has to be aware of which direction the finger is pointing.
Janey - Neat people never make the exciting discoveries I do.