Beschreibung
The drawing seems to be a copy after a similar ground plan in Montréal CCA DR1982:0020:19r, because all of the (fewer) measurements in Stockholm are identical with those in the CCA drawing.
The upper drawing is related to the Montréal CCA DR1982:0020:028r, but a few differences in the measurement make it difficult to decide which is the original and which the copy. Because of the usual direction Montréal CCA => Stockholm, it seems plausible that this is the case also here – or both derive from the sam prototype. The very few differences could be explained as simple copy errors.