As previously mentioned, the archival information is somewhat contradictory and probably incomplete. However, it should be noted that the date of the document already posted is not earlier than 15.09.1944. Other paragraphs therein also suggest final figures.
I attach another dated 07.09.1943 which indicates that production of the Pat.1907 had ceased. (Para.4). Under the circumstances it would be rather strange if a fresh batch was received a year later.