Anything is possible. From what I see in this picture the following things “feel wrong”

The frame above the trigger is part of the front/barrel assembly, where on almost all other revolvers, particularly open top models, it would be part of the rear frame.

The set up with the nipples set at the back of the cylinder and shielded inside the recoil shield is reminiscent of the older pepperbox style. While it might protect the shooter from cap fragments it increases the risk of chainfire by trapping any leaked flame in around the other nipples. Unusual setup.

The deep capping groove, necessitated by the previous comment, is unusual.

The rear frame looks as though it may be made up from separate parts, although this cannot be seen in the picture.

Where the handgrip, frame and triggergaurd meet they all overlap, where they would usually come together smoothly.

The trigger appears to have a distinct change in direction, a ‘corner’ rather than a smooth curve.

The bullet seating recess near the ramrod is unusual and suggests the front frame is too wide for the cylinder.

The ramrod appears to be angled in relation to the chamber where it should be directly in line. It is also not well supported where it passes through the frame.

I see nothing to lock the ramrod in the stored position, meaning it could drop down during use and jam the gun.

There appears to be a rear sight above the barrel forcing cone, where it would usually be towards the rear of the frame.

The way the timber drops down to the frame without being inlet is unusual, as is the two grip screws, where most revolvers are inlet and have only one screw.

I would like to think Igorrock has found a rare gun that has slipped quietly into history, but I suspect a home-grown gun is more likely.

More details and pictures would be interesting, whatever the case. What calibre, is it rifled, etc.