In reviewing your excellent picture of the Weldless twist barrels,it appears as though the barrel blanks were twisted from both ends[ie: gives the impression of a left and right hand twist that meet in the approximate centre of the barrel]!The example that I once owned had a continuous twist in one direction through out the length of the barrel.The resultant pattern,was as seen, on page 243 of Greener,s book, "The Gun." I was unable to find a reference to, Weldless twist barrels in Graham Greeners book,"The Greener Story." I wonder if a Greener patent exists, or was Greener producing/using barrels under licence based on the U.S.A.patent mentioned in an earlier post?
