I have 3 Custom Conversion Double Rifles built by the late Bob Hynden. Bob was very prolific posting here on this and other forums. He had over 730 posts as Birdhunter50 over 9 years.
Sadly, he passed away unexpectedly in 2017.

http://forums.nitroexpress.com/dosearch....&fromprof=1

All 3 of my Double Rifles are cased, but Bob never had a letterhead or logo or label to document his work. Now he has one.