rinos, that's an interesting find. Depending on the construction (does it have lot of blade-play?) I'd keep it as one knife and re-handle with something of quality. Wood or horn say.
As for the markings, the connoisseurs over at Levine's will know, all I can say is that CH. makes me think of Swiss origins or stampings.
And yes, I like my GEC 56 E-Z Open which is a semi-hawk bill (junior hawk...) and it sees action in the garden in springtime.
Regards, Will