more photos would help with less confusion.
Instead of just the dimensions include the logo/writing above the dimensions

If it is a 490 but has IMCS of 26 then I think it is pretty old/weird/ not much use for modern sails (say, last 10-15yrs)

(If I had to guess)


Also if it has had a repair anywhere, then it is really only useful for beginners in waist deep water, or as a flagpole. You really can't reliable repair masts unless it is a little split at very bottom or replacing the ferrule (if one is very careful)
A repair there, 15 - 30cm up from the bottom(?) sounds very unreliable.

^^ I knew that 5 looked like a familiar font and I reckon you are onto it. Old Fiberspar Reflex. Reflex 3200 (30%) was yellow, wave was blue, a freeride of about 50% has the red lettering/????)
About 2000-04 vintage....?

I thought it looked familiar - I've got a similar one which I bought new in the late 90's.

Not true at all about repairing masts, they work fine if it's done right.

I've got an RDM that was repaired 3 years ago and is still going strong and also a 460 SDM that is 2 years on the repair. I've also got a 520 sitting here, that I haven't sailed yet, since the repair, but expect it will be fine, maybe I'll try it today...