Pedro;
As the 3-25 they were made 1930-1932 - they were certainly available thru the Christmas season in 1931 so made/available into 1932. Also, consider that as a junior it was likely made a bit later than 1932. Daniel possibly has more details on these.
Roger W.
Hi Roger,
I believe we don't know the Blue Balance was made 1930-32, though it might have been. IIRC, so far there are images out showing pens during 1931-2?
regards
David