Kodak Retinette 1B Camera with Rodenstock 45mm f2.8

Kodak Retinette 1B Camera with case with Rodenstock 45mm f2.8 Shutter firing well...but jamming open on B. Meter appears working. Front lens element/focus unscrews too much when focussing. Lovely condition, but selling for spares/repairs and as is because of this.