1st Series or Sequence for sure so pre-1891/1892. Interesting mechanic initials AB on the frame paired w/ those on the tubes. I do wonder if subcontractor mechanic AB did most of the work? I think that I have attributed the initials AB to August Blatt of Suhl-Albrechts. His concern was entitled Gewehrteile und Metallwarenfabrik and he had some novel device or trademark of Diopter Marke Perfekt. I believe he shuffled off the mortal coil in 1920.
But maybe we should look for initials on all other Lindner-Dalys on the frame?
Serbus,
Raimey
rse
