From 1916 LN draft, with a correction that made it into the 1922 OMH ed.typ.
Somehow this A/ is given as 1g in the Vaticana draft and the 1922 OMH ed.typ, but as 1g3 in Turco etc.
Should be standardized to 1g in conformance with the typica (confirmed by looking at OMH56)