Here are a couple of shots of the barrel on my 1918 DWM artillery....
Cannot be sure who made the barrel, but I think it does have DWM proofing and not Erfurt proofing...
<a href="http://boards.rennlist.com/lfupload/artyproof2a.jpg" target="_fullview"><img src="http://boards.rennlist.com/lfupload/artyproof2a.jpg" width="400" alt="Click for fullsize image" /></a>
<a href="http://boards.rennlist.com/lfupload/artyproof3a.jpg" target="_fullview"><img src="http://boards.rennlist.com/lfupload/artyproof3a.jpg" width="400" alt="Click for fullsize image" /></a>
Regards,
Pete... <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />