[ Ref. Brian Chesters in MMD 001220. ]

The mentioned catalogue is like all Welte catalogues for both types
of rolls, Red and Green.  It's a translation of the 1925 German main
catalogue and includes the 1926, but not the 1927, supplement.

If you're only interested in the data, I can provide you with a simple
photocopy; the price [GBP 100] seems crazy to me.

Best wishes from Freiburg

Gerhard Dangel-Reese
Augustinermuseum Freiburg