Dear Joe,
The editing and updating of
RIC 2.1 A&C was mainly done by the late Ted Buttrey, who released the latest version in May 2017.
No updates have been released since then, although
Ian Carradice regularly takes note of new reports.
Although Ted was not fully convinced of the need to create this new variety without
mint marks, these coins were referenced as a
part of the newly created series 1426(5A).
Your
type, in particular, was provisionally registered under number 1426(5A)3.
As an example was cited
Lanz 94 22/11/1998 310; you can find it here:
https://www.acsearch.info/search.html?id=67258Kind regards
Alberto