I'm looking for information on the old KuMoHa 12 series cars. Especially those days when they were in mainline commuter service as MoHa 31-s and after 1959 as KuMoHa 12-s. Technical details, consist info, usage of cab/trailer cars (salo/saha/kuha), photos, films, etc. So if anyone has info on this old type, please share it here.