This interesting image shows a derailleur that is very similar to a Belri, except:

• It is branded 'Belleri' rather than 'Belri'.
• Some of the pivots have screwdriver heads - implying that they are demountable. The Belri is fully rivetted.
• The adjustment screws are Allen bolts. The Belri has screwdriver heads on its adjustment screws.

• Publisher: Le Cycle
• Country: France
• Date: April 1972
• Derailleur brands: Belri
• Derailleurs: Belri