Before Jack started the 1st book he advertised in both mags & at Shows for pictures of pumps [& even now is always asking for permission to use pictures]. He is always looking for pictures of pumps that he doesn't have Factory Info for.
After the 1st book was published, LOTS of collectors started posting pic's of their pump that wasn't in the book. The 2nd edition Included some of the pump that missed the 1st edition.
WE & Jack have NO IDEA what pumps were made, used & SCRAPED during WW2. Some small companies only made 1, 2, 3 pumps Before the depression hit & they went under along w/ 10 of Thousands of larger companies.
Even the 2nd edition doesn't have the Tok 36-Non Computing [Jack didn't have Co. Info or a pic].
Now think about this;
Tok. made Twins BEFORE & AFTER the 34. WHY did they Skip the 34, Tok. 1st Veeder-Root pump [Tok. 850 & 870 Twins, 36 & 36B Twins]?
Tok. had the 850, 870, 36, 36B & 39 Clock Face pumps, WHY did they SKIP the 34 Clock Face?
ALL pump companies using the VR had to pay a Royalty, even WAYNE & they were part owners of VR.
By using a Clock Face, pump companies could sell a pump for less to commercial & Non Retail sales customers.