"Twist Barrels" include several different variations and qualities. The best quality Twiwt seems to be "English Twist", made in Belgium. These tubes exibit the highest wire count with the least Butt welds. Baker used these tubes extensively.
Parker twist barrels are very high quality. The lower wire count was compensated by barrel wall thickness.
A major factor that we consider in rating twist quality is annular pitting. When pitting follows the weld lines it would indicate to me poor welds or lower quality Iron. This type of pitting is prevelant in stub twist and lower quality tubes.
The major manufacturers used the best quality, lesser manufacturers poor quality tubes. You got what you paid for.
Brad
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