Good eye.
From left to right.
Webra 61 racing 1033RC
Webra 61 racing competition 1033c
Webra 61 racing competition 1033c
Webra 80 racing competition 1039
All share the same rod and front housing. Black head crankshaft is 1/4 shaft. The 1033c and 1039 share the same crankshaft.
All are great running engines.