Your best bet might be to ask over at Rimfire Central. Some of these had a single extractor, and some had a double extractor setup. Might be obvious by looking at the bolt closely, to see if it has cutouts for 2 extractors, or only one.
The single extractor is held in by spring pressure. The double extractor setup had the extractor held in by a pin (and thus, the replacement extractor has a hole in it).
My Model 30 (with genuine red nylon retractable sling in the stock!) that has the left handed bolt handle, has a single extractor setup.