The "Voratszeichen" = In stock mark, V under crown stamp similar to the London "view" mark, was stamped on guns "ready for sale" on maker's and dealer's shelves when the 1891 German proof law became effective on April 1, 1893 to document they were made earlier and so exempt from proof. As I have a copy of the original "Bekanntmachung, betreffend die Anbringung des Vorrathszeichens auf Handfeuerwaffen" = public order regarding the application of the stock stamp on firearms from January 4, 1893 I can posibly date it closer. The German city and county authorities had to order these stamps from the Royal Arsenal in Spandau and were to destroy them after April 1, 1893. so the time span for the crown/V stamp is limited to February-March 1893. As this rifle also shows a post-April 1, 1893 "repair" proof, it was either rechambered/rebored later or simply submitted for proof "just to be sure". According to the original proof tables, a 47 gauge = 11.76mm = .463" plug passed one barrel bore at the proofhouse, while the other was slightly narrower and allowed only a 48 gauge = 11.68mm = .460 plug.