Saudi Arabia 1960 Issue .... Expert Help Required Pleaase !

Hello Everyone !
I hope someone here can help me with this query.
I'm trying to discover the correct Stanley Gibbons Numbers for thesse 3 items.
I only have the simplified world catalogue and it's not as helpful as I would like !
The first 2 on the left appear to be SG410 but the centre colours are different, 1 has an olive green tone the other light brown.Both have the Arabic inscription lower in the frame compared to the stamp far right which has the inscrition higher up in the frame which suggests by Gibbons catalogue that its 1964 SG555a issue.
Can anyone confirm or correct my thoughts please, I want to sell, but have no idea of current value so would appreciate your help there too.
Thank you very much !

It looks to me like the vignettes are registered differently or shifted rather than the inscription being deliberately printed lower.

Scott lists two 100p stamps, one with a greenish blue (#225) vignette or center, and the other with a red-brown (#241). They are listed at $60 and $50 respectively in my 2006 catalog for mint stamps. The 1965 stamps are distinguished from the 1960 stamps by the cartouche in the upper right of the vignette. Although difficult to see in your photograph, yours all look to be the cartouche of King Saud from the 1960 series.