Verify your length and app please.  This brake rod about 18 1/4"/460mm.  Should fit most early Guzzi Tonti with civilian pegs (NOT floorboards) and rear drum brake.  Note:  Some V7 Sport used a CABLE, not suitable to replace, I believe.

This listing includes everything shown, in stainless steel: 

1367-6060  brake rod 
9576-0260  knurled adjusting nut 
9571-6368  barrel 
9550-0222  cotter pin 
9510-0137  washer 

I will answer questions promptly, thanks for looking.