It's interesting, to some, in that it is a C grade with Bernard barrels. But it is pretty rough and the stock looks to have been replaced. I'd be interested to know what shape the bores are in.

I definitely see a stag on the floorplate. I really like the engraving on it. A great example of C-grade engraving

My guess is it saw hard usage in the duck marsh.

Probably stored in a closet or under a bed with no protection from change of season temps and humidity.

Notice how the checkering is worn down. That indicates to me it got a lot of use. It could have been the victim of other disasters as well, though

It looks like it has potential, particularly if the bores are clean

Yes, that buttstock is a replacement and looks like it may not be a Parker original replacement. The forend is original.
Overall it is a good candidate for restoration providing the bores are good. The engraving is not too badly worn. A few screws messed up. And it is complete... save the stock. But its all there and workable. And a 1 frame too.

a rare c grade for the collector on a budget?

This gun has alot of potential. The rib engraving looks correct to me. Most Bernard guns I have examined have hand engraved rib legends.