Did Gottwald also build crawler cranes?
Yes. They built two RG 912s which are crawler versions of the AK 912. One was build for Saldotechnica in Italy, which was later sold to Alatas in the Middle East. The second crane went to Grandi and it is now with Mammoet. Remarkably, this crane was sold with a Maxilift but without the crawlers that Grandi had built by another company. The same is true for the AK 1200. It was also supplied to Grandi without tracks and fitted with crawlers there. Like the RG912 it went to Mammoet and is now with Sindorf, NL.