Shown in PLINC’s One Line (1971) in two styles, Davison Impacta (shown) and Davison Impacta Shaded (open with solid SE shadow). At least the latter is also shown in their 1969 Alphabet Yearbook.
Photo(s) by Groove is in the Art on Flickr.
Contributed by Florian Hardwig
Contributed by Matthijs Sluiter