Hi Ricardo,
I think you are confusing introduction of the relieved sear bar with the retro-fitting of the hold-open feature which was performed from late 1913 until the onset of hostilities in Aug 1914. The armies of Bavaria and Wurttemberg and those of some of the smaller principalities were scheduled to have this up-date installed late in 1914 but the war prevented it from being performed. Rest assured, this was not from a lack of "fastidiousness".
Norm
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