drilling in 16 ga and 11mm for sale in the netherlands
I am still thinking that this is the 11,15x65R. have find no proof the mysterious 10,75x65R collath exist!

http://www.wapenhandelwagemakers.nl/shop...00df899a74ae3bd

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remarkable because of the extended forend - factory made???

High quality German Drilling combination rifle, by Collath and Sohne, Frankfurt, 16 gauge SxS shotgun over 8mm rifle, 25-1/2” barrel, blue finish on nitro proofed barrels, case hardened receiver with fine Europeanengraving, checkered wood stocks, #22032. This gun is in overall uncleaned fine condition showing the majority of its blue finish on barrels with traces of case color on receiver, balance gone to a silvery tone;bores should clean to very good/fine; crisp action; unusual barrel release that moves the barrels and part of wood fore end forward and down; key safety lever on top tang, flip up rear sight actuated by small lever onright side of trigger guard that is carved horn material as is the barrel release lever; wood is overall very good to fine with sling swivels and horn butt plate that has some slight worm damage. A really nice earlyDrilling. Est.: $600-$1,200.

http://www.icollector.com/High-quality-G...-shot_i11642529

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described as a cape gun I cant see whats with the rifled barrel. side by side combination guns by collath seems to be very rare. right barrel is steal and left barrel is damascus what was common for büchsflinten in this time. only marked with Cal. 1 for a double gun the rifle barrel was maybe a later change not done by collath. number 6917 must be in the years between 1895 and 1900.

http://www.liveauctioneers.com/item/11488830_rare-cape-gun-side-by-side-attr-to-collath

Rare Cape Gun Side by Side attr. to Collath with Damascus steel & regular stell barrels. (One side shotgun, 1 side rifle) Walnut stock with finely engraved silver details depicting hunting and game scenes. Very fine crosshatch work on stock. Gold monogrammed on top. Markings located on underside of barrel and on stock as follows: No. 6917 Cal. (on stock, as photographed.) Markings on barrel: 6749, D, 4grp219rB1, 6917, 12 and Seven (7) stamped characters (as photographed)

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well a Collath Drilling in 16 ga and 8x57,5R Rubin is something near impossible
must be a 8x5/R 360

http://www.gunauction.com/buy/12146150/g...6x-8x57.5-rubin

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W. Collath and Son -- Cape Gun, side by side 9.3x72mm and 16ga

Original W. Collath and son cape gun/combo gun in 9.3x72 mm on the Rifle side and 16ga on the shotgun side. Bores are pretty nice, Horn Buttplate, triggerguard and break lever., stock has not been cut, no apparent cracks in the wood, everything is functional and gun is shootable. sn:19141.

http://www.gunauction.com/buy/7510152/gu...3x72mm-and-16ga

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single shot rifle in 6,5x52R
http://www.google.de/imgres?imgurl=http%...ed=0CIcBEK0DMB8