I just got the book about Stihl, and there is some very interesting things about the Contra in it.
The sandcast Contra is known to many as a form of prototype or advertising model of the Contra. The book tells another story... And i have compared it with some other documents.
This is the result:
The Contra was not named Contra at the start, its was under the name Model D24. The name was then change to Contra in Europe and Lightning in the USA for maketing reasons.
The saw had a lot of problems at the start of the production. Most of the problems was with the crankshaft and connectionrod that was not strong enough. The production of these parts was also very difficult.
24.05.1959 with serial nr. 83.602 the conectionrod was changed and again at 24.06.1959 with serial nr. 84.832.
The most interesting thing is that the production of the sandcast crankcase was also stopped 24.06.1959 with serial nr. 84.832. The reason for this is not that it was a prototype or an advertising model. The crankcase simple broke, it was not strong enough and Stihl switch to diecast crankcase, the sandcast crankcase was not produced by Stihl, but another supplier and Stihl startet there own production of diecast crankcases.
There is also mentioned that a successor to the Contra was developed and testet, but there were so many problems with the design that the saw was scrapped and never put in production.
The sandcast model is rare like... Its not because it was a prototype and made in limitet numbers, it just broke down and most was scrapped back in 1959.
I hope you all like my little investigation in the sandcast Contra...