Frank, we have to be patient and slowly browse available resources. The human memory is weak, the best support we can get from old designers is allowance to use their archives.
In fact, pattern numbers are minor, those are important only for mad men we both are.
I am happy rather to listen stories and memories from Mr. Urban, than to try get exact dimensions or patterns from him. Working with Mr. Vizner I have found, that I know much more and better the dates of his designes than Frantisek himself. Documented drawing with date is for attribution more serious resource than memories of the old man.
Anyway, I am feeling myself honoured and priviledged, I have got and I still have a chance to meet and speak to people like Mr. Urban
and Mr. Schmid.