That blue lid looks...at least from the holes, to be a Series III Giulia Sprint lid, with the big chrome number plate bracket and the 1600 badge on the lower RHS
The pure 750 Series I boot lids have the opening for the aeroplane
The Interim / Transition Sprints also have the opening for the aeroplane, but the lid was a different shape as the fenders or mudguards on these cars were now pressed or stamped parts rather than the hand-beaten panels of the Series I cars.
The Series II pure 101 cars had no opening for the aeroplane
The Series III Giulia 1600cc cars + the last of them, the 1300 Sprint also had no opening for the aeroplane and an extra engine capacity badge on the lower RHS of the lid.
The stamped panels lasted from mid '58 to '65 (or very early '66) when the last of the 1300 Sprints were produced, by this time the dies were quite worn and because of this, the shapes of the panels had slowly changed over the years meaning that the closures (doors, bonnet & boot) were all hand fiddled and fettled on the line to suit individual chassis, hence parts from a '65 will not fit a '61, but parts from two different '61's may be very much closer, depending how far apart the chassis number are.
There is a definite difference in shape between a Series I Sprint and a Series II Sprint and nothing will be interchangeable unless you are prepared to do a huge amount of work.
I have a spare boot lid from a '60 and we repaired the original lid from Dad's 'January '60 Sprint as the other fitted like the back door of a Transit van.......
I realise this isn't the answer you were hoping for, unfortunately with Bertone there isn't an easy solution.
While Battista 'Pinin' Farina slept well at night knowing his design was good, Nuccio Bertone also slept well at night knowing that Luigi-on-the-line and his cousin Giovanni would just make it up as they went along......
And that's how it happened on the Bertone line and here we are 50 year later !!
Ciao
Greig
3 x 750B's
1 x 750E
1 x 750B Interim
1 x 10102
1 x 750D
2 x 10103 Interims
1 x 10109