Different rear wing length

Hi all. Wonder if anyone can help with a question. I’m rebuilding a series 2a 109. I’ve a donar rear tub and the front sections of the wings are different lengths. One is 75cm the other one 69. It looks like one of the skins has been replaced so I did wonder if someone has fitted a 110 rear wing?
Grateful for any thought. I’m trying to rebuild it as original so would like to fit the right wings fitted.
Thanks

Which ever wing makes the tyre look like it’s in the center.
You can see from your photos the wrong one.

Unsure of measurements but is it possible to have the incorrect handed/side panel fitted?
(measure both edges from each side of the tyres arch to the edge this may confirm)

Shouldn’t the wheel look like it’s a bit close to the front of the arch. It does on my 88. I thought it was for the swing on the shackles.

Might just be mine