looks like a dry plate camera. probably late 1890s....just a guess. FWIW my cooke series II f4.5 knuckler lens says anastigmat portrait on it. does it have three sets of glass in it? probably not as you said the rear came apart in two pieces.

measure the ground glass and show us more pictures. be careful modifying the camera....it may be worth more unmolested.

have fun

eddie