S.79 in Spain

[Mario_R]

Dear all,
I have another question:
- The first 12 S.79s – belonging to the first production series – arrived in Spain with the "classic" livery of three-color, hard-edge transverse/diagonal bands (livrea a bande trasversali/diagonali a bordi netti di tre colori), about which I have little to add or ask.
- Many of these aircraft and others sent later (still received by the units with the diagonal band livery) were repainted on the field:
some in likely in two colors, one dark – interpreted as green – and one light – interpreted as yellow; the yellow has been interpreted as the base color and the green as the subsequent color. Some interpretations show these aircraft repainted with a few sparse brown spots, in addition to the predominant yellow and green.
other S.79s received a much darker and more complex livery, with the banding pattern more or less preserved but covered with very dense patches.
The camouflage patterns applied in the field to the S.79s and S.81s underwent more or less the same evolution.
- The last batch of S.79s, sent to Spain in the summer of 1939, wore the new factory livery with dense, three-color spots (macchie fitte a tre colori).

I rely primarily on the reconstructions advanced in "I colori dell'Aviazione Legionaria", published by Gli Archivi Ritrovati; these hypotheses are confirmed — or at least not contradicted — by the volumes Ali d'Italia and the Dossiers and Briefings of Storia Militare.

My questions are:
1) Are the hypotheses regarding the colors applied in the field to the S.79s in Spain, and more generally to Italian aircraft in Spain, supported by written documents or color photographs? Or were they hypothesized solely because of their "similarity" to the factory colors applied in Italy? In particular, if there are no written documents or color photographs, why is the use of gray excluded, as it is believed to be present on the multi-colored patchwork liveries applied to approximately contemporary aircraft? Why, given the Spanish environment, was green hypothesized to be the dark color and not brown? Wouldn't a yellow and brown camouflage blend better with the landscape than a green and brown one?

2) Is there evidence that the last batch of S.79s received the three-color dense patchwork livery (type A grid camouflage pattern for spring) from the factory, and therefore, in practice, the S.79 line transitioned from the diagonal-banded livery (bande diagonali a bordi sfumati) to the "definitive" three-color dense patchwork livery (excluding, for Spain, the S.79s produced with the diagonal-banded livery with blurred edges), not one of the hypothesized "preliminary" two-color patchwork liveries—type B summer/early autumn or C late autumn/winter?

Thanks
Mario