I've written about these albums several times. They were intended as supplements to the Brown Internationals between release of the latest bound volumes. For those interested, a recent thread on the Stamp Community Forum contains some interesting photos and scans.
As a reminder, the last volume of the Browns issued by Scott stops with issues from 1938/39. But the Vintage Reproductions edition of the Browns takes the albums through 1940. So how was Vintage Reproductions able to bring the Browns up to date? (I asked and "they" don't remember.) The possibilities would seem to be:
1) there was an Annual Album published for 1939/1940 which has eluded the Internet (almost certainly not the case);
2) an Annual Album for 1939/1940 was prepared but never published once Scott decided to discontinue the Browns--Vintage Reproductions somehow got hold of one;
3) Scott actually prepared the pages to bring the Browns up to 1940 but decided to cut their costs and remainder the existing set rather than releasing an album for the latest issues--again, Vintage Reproductions somehow got hold of one;
4) Vintage Reproductions used Scott Specialty albums to reconstruct 1939/1940.
I lean towards the latter explanation but honestly do not know. I wonder if someone had the Specialty Albums from this era whether they would faithfully match the Vintage Reproductions pages for these years?
Here is a link to the thread on Stamp Community Forum.
To see my previous posts on these albums, type 'annual album' or 'progressive album' in the search engine box at the top left of this page.