J Bushnell Smith also had Winchester make R2 cases. They were headstamped JBS 2R (or R2 I would have to go look at one)
If anyone wants a scan of the original May 1934 article by Hervey Lovell I can email it to you. There was another article in December, 1934 by Davis. F.C. Ness rambles on quite a bit about the 22-3000 and its descendants in his "Practical Dope on the 22s" and there are some good drawings for the two early 22-3000 variants as well as the 2R (1937, not 1947) by Risley and Donaldson.
I have a new CH4D 22-3000 Lovell size die, 2nd version that I don't need. Contact me directly if interested.
All the G&H 22-3000s I have are 2R type, but they surely furnished the original form also.
