Terry Wieland excelled in Gray`s Sporting Journal, declaring the Boss O/U with Robertson`s ejectors as "self-opening". A lot of colleagues rightly wrote on Facebook he was wrong. But no one reacted to Wieland's statement there aren`t another self opening O/U. Actually there are only two that shotguns. These are their locks. Maybe someone knows?
To refresh the memory https://wp.me/p461yQ-jF

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[Linked Image from shotguncollector.files.wordpress.com]