Quote:
i trust your opinion can you just shortly tell me why 1902, caus from the point of color it looks to me more like 1911/1912 thanks
Well done!

I stand corrected, as usual I took the colour and the least expensive, that generally proves correct. I should have been more precise.
So, where do we stand? to be frank, I don't know.
You shall need a specialist.
There are 8 types from what I can see, including chalky paper.
Scott would have us believe you can note the difference in perforation
P14 visa v P15x14
but Stanley Gibbons does not appear to confirm that
I'll stand by my opinion, but happily change via a specialists opinion.