This may be the scabbiest item in this collection. I don't know what Argentinians like to do to their derailleurs, but it seems to involve the judicious use of a Javelin anti-tank missile.

Gambato had no shame. Not content with copying the iconic Campagnolo Gran Sport in some considerable detail, they also faithfully copied the loathsome Campagnolo Sport.

Look carefully at this Gambato Sport and you will see that the outer parallelogram plate (including the cable clamp extension) is all there - it is just folded over itself like a piece of steel origami. I was tempted to try to unfold it - but I feared it might break. In addition to this, the pulley cage is missing its inner plate and the cable stop mounting on the b-knuckle has broken and been artfully rewelded. It's never good when a derailleur exhibits a spot of home welding.

The original Campagnolo derailleur is horrid, the Gambato copy is horrider and a gruesomely mutilated example of the Gambato copy is horridest.

• Derailleur brands: Gambato
• Country: Argentina
• Date of introduction: 1969?
• Date of this example: unknown
• Model no.: unknown
• Weight: 205g for a very partial item
• Maximum cog: 22 teeth (Campagnolo’s figure for the Sport)
• Total capacity: 6 teeth (Campagnolo’s figure for the Sport)
• Pulley centre to centre: not applicable
• Index compatibility: friction
• Chain width: 3/32”
• Logic: top normal
• B pivot: sprung
• P pivot: none
• Materials: bronze b-knuckle, the rest is steel