Jerry graciously shared full size images, which are quite interesting. The breech shows poorly matched 'Oxford' Parker D3, both in the appearance of the scrolls, and the manner in which the iron/steel responded to the coloring
EXCELLENT demonstration of the juncture of the tube segments toward the muzzle. From left to right:
1/2 scroll with (mostly) straight ribband edge butt weld
2 full scrolls with (down the middle) 'zipper' (wavy) welds
scroll with the straight weld between the two tube sections
2 full different scrolls with (down the middle) 'zipper' welds
1/2 scroll with (mostly) straight ribband edge butt weld
Thanks Jerry!