Orange P7 sizing

philpeak

Old School Hero
Looking for some help with late 90's early 00's orange sizing

Trying to work out if a frame measuring 17" centre of bb to top of seat tube is a 17" or 15"? (Measures 15" centre of bb to centre of top tube)

Looked at the geometry chart and the only dimension listed that identifies the difference between the two sizes is the top tube length.
(Not sure if this is measure centre to centre along the diagonal length or horizontally? )

All the measurements I have seen on eBay or gumtree listing tend to be seat tube length and when I have asked for other dimensions they tend to vary wildly! so if anyone has a 17" they could measure and feedback that may help In the future
 
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