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HTH

It's Bell & Howell type A-3: Electric motor driven

these two lines are the joint of 1/4"glasses and just behind, lined up to them there were the tie rods(3/16 dia) which maintain the top and bottom frame

Sorry, I'm wrong(fail memory) about the fuel cap on early P40 , Dana give the good response, fuel cap was on fuselage just below the port rear window

Effectively, there were no vertical frame On P 36 and P40, up to P40C, the windscreen was an assembly of three piece of non shatterable glass maintained together in top ans bottom frames assembly by two rods screwed. the joints between the glasses were filled with glue.

I would add wing guns (one per wing) had their ammo access on upper surface of wing and fuselage guns were long model(the short type was made by cut off the forward end of these tube at a 25° angle, from 7th jul 41) and there was one hole only in the rear window for fuel cap, the oil cap acces door was on the frame aft the glass

the guns are aligned according the convenience of place in the wing. they are not on horizontal plan nor in the airfoil chord gun diagram

https://imagesdefense.gouv.fr/fr/catalogsearch/advanced/result/?keywords_ids[0]=7744&p=2 link above, where you can see several other pics of "80" at different period and others french F5A and B. the number and color of mission markings , "camera stylized", were different also. at the beginning there were 9, in single color(red, black?), then these 9 symbols are painted in blue/white/red and there are 5 halves added, at the last the amount was 15 entire symbols b/w/r. may be these last markings where added especiallyfor photo reporting on St Ex is " Jeanne" added by the french or written by U.S crew , unfortunately on the pic the engine mask this nacelle area but there was not the dark crossed markings below the "80"

"80" with U.S insignia under starboard wing, when she just delivered to french group. insignia seems yellow outlined, without bar.

"yellow green" interior french Hawk N° 223(?) , firewall to frame 3 this primer was common to "Export Hawk" (spec Curtiss S-517) yellow green was applied over prussian blue Lionoil shop coat.(which prevent scratches on surface of Alclad Skin).

baille lemaire GH 38 gunsight on A1 to A3 and below, british gunsight on A4 Instruments panels A1, A2, A3 & A4 french Hawk (pic from EMM of each models)

from factory drawings, HTH

their location was not the same depending on the model; Sometimes the red light was near the bomb door

MS 405/406 , 1937/38 (EMM MS 406, finish) ms 405 / MS 406 received kaki on upper surface and gris bleu clair on under surface. the delimitation between kaki/gbc is straight along the bottom fuselage longeron from wing trailing edge to stabilizer leading edge 38-39 , the délimitation is wavy (short wave) (MS 405 seen at Chartres) MS 406: dec 39, a nota was introduced(MS factory camo & markings drawing): upper surface will be received gris bleu foncé and brun(chocolate) blotches over the kaki. the delimitation of colours was blended by overspraying delimitation with undersurface bris bleu clair was straight. these blotches must be differ from an airplane to other.

I use a wrong word in place of camshaft casing - sorry- the MS 405/406 engine angle settings are - 1° down - 1° 26' left for the airfoils I have the data for all the ribs, I'll look at,