Daniele Patucchi wrote an excellent score with Greek notes in the Main Theme and Theme Of Corinto!
IL SORRISO DEL RAGNO - Main theme (Title) has a lot of alternate variations, released on rare LP:
Brani Ritmici A Sottofondo (1973) [Cam Cml 029]
Very romantic, lovely, pretty piece!
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TEMA DI CORINTO - Theme also with mandolin sounds
Temi Conduttori Brillanti [Cam Cml 031]
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Verso L'Ignoto - typical tension action theme
Reused in METRALETTA STEIN; LE RICAIN
Also released on this LP (you can preview)
http://www.funkabolik.com/vinyl.asp?codice=3241GIALLO 1 [CML 022]
http://masasaruyopitako.sakura.ne.jp/CAM_Comp1_20.html-------------------------
I also suppose that the track
TELA DI RAGNO - actually from IL SORRISO DEL RAGNO although i didn't hear this track in the movie, but i haven't watched this movie completely.
http://masasaruyopitako.sakura.ne.jp/CAM_Comp1_20.html