going thru the older Hermann Historica auction catalogs

a Bockbüchsflinte, 16/65 over 6,5x58R

"W. COLLATH SÖHNE FRANKFURT A.O./WITTENER - EXCELSIOR"

http://www.hermann-historica.de/db2_de/aktuelle-auktion.html

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Drilling Nr. 15141. 16/65 and 8 x 58 R
crown and S W U G proof, "WITTENER EXCELSIOR" and "PATENT W. COLLAT" "FRANKFURT A/O""

a BISCHOFF, BRAUNSCHWEIG", "DINOX 6 x 56" scope

http://www.hermann-historica.de/db2_de/aktuelle-auktion.html

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this must be very old
a single shot rifle in 11,2x60R Mauser
serial number 1491

http://www.hermann-historica.de/db2_de/aktuelle-auktion.html
"W. COLLATH - FRANKFURT A.O."

when the 3500 serial number range was short before the 1891 proof law this rifle number 1491 could not be made before 1873/74 when the mauser 71 realy starts
this would mean only 1500 guns since the late 1850s