Howdah Pistol - Double-Barrel Pin-Fire

[vintage hunter]

Those are Belgian proof markings. The crown/E/LG/star designates it was proved in conformity of German Proof Laws of 1891. The crown/R indicates rifled barrels. The intertwined EL above the 10.9 is the provisional proof of the barrels prior to permanent breeching. Not certain but the 10.9 may be a caliber designation. Looks a bit too large in the pics but 10.9 mm roughly equals .429 caliber and it's a center fire, not a pin fire.

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[dttuner]

Those are Belgian proof markings. The crown/E/LG/star designates it was proved in conformity of German Proof Laws of 1891. The crown/R indicates rifled barrels. The intertwined EL above the 10.9 is the provisional proof of the barrels prior to permanent breeching. Not certain but the 10.9 may be a caliber designation. Looks a bit too large in the pics but 10.9 mm roughly equals .429 caliber and it's a center fire, not a pin fire.

As usual, blown away by the wealth of knowledge on this forum.

I was able to insert a .44 caliber casing into both chambers, but not able to close the action.
So, I'd say your evaluation is spot-on.