Actually I measured the inseam length again and it's about 70CM / 27.5 inches (without shoes on) - so unfortunately I should be looking at a 47CM bike (instead of 48/49)
For reference: my inseam is 89cm, and I ride 61cm to 65cm frames, i.e. 0.69-0.73 times my inseam. With a 70cm inseam that would translate to a 48cm - 51cm range.
I am not sure such a translation is entirely valid, but 47cm seems small-ish to me.
Most of my touring bikes have 64cm / 25" frames:
