tubbyl and DaveR,
I am pretty sure it is a 707-436 photographed before the modifications required by D P Davies before it could go on the UK register. Listen here:-
https://www.aerosociety.com/news/aud...nnia-brabazon/
I remember that Hamble brochure well as I received one in 1959 or '60 before I went to Hamble in 1960.