Saavedra derailleurs are Rino's Crono design repurposed for the Argentine market. It seems that the parts were forged by Rino in Italy, but the logos were applied and the derailleurs were assembled by Saavedra in Argentina. However, like the Rino product the rear parallelogram plate is stamped 'Made in Italy'. You can see a brief discussion of this in the interview here.

The Saavedra uses a an excellent slant-parallelogram layout ('borrowed' by Rino from SunTour) and is formed and finished to a respectable standard. Notably, it is fully demountable. There is a decent case to be made that these (and their Rino and Excel siblings) are among the best non-Japanese derailleurs available at the time.

I think that this is an early example of a Saavedra derailleur, dating from about 1981. It has domed allen bolts at the b-pivot and p-pivot and a closed loop in the inner pulley cage plate at the tension pulley. Some of its key features may be:

• The logo is silver lettering on a red background, surrounded by a raised border on all 4 sides.
• The main allen bolts at the b-pivot and p-pivot are domed and engraved with 'SAAVEDRA ARGENTINA'.
• The parallelogram pivots and cable clamp bolt and washer are black.
• The inner pulley cage plate has a closed loop at the tension pulley
• The adjustment screws have very squared-off heads.

• Derailleur brands: Saavedra, parts manufactured by Rino
• Country: Argentina, parts (?) manufactured in Italy
• Date of introduction: 1981?
• Date of this example: unknown
• Model no.: unknown
• Weight: 194g
• Maximum cog: 24 teeth?
• Total capacity: 24 teeth?
• Pulley centre to centre: 48mm
• Index compatibility: friction
• Chain width: 3/32”
• Logic: top normal
• B pivot: unsprung
• P pivot: sprung
• Materials: largely aluminium