Hi,
Well, the short, knee-jerk answer is no. Green stitching might lead us to think of the Landjahr pennants but those weren't numbered and instead had "Landjahr" stitched onto them. Let's assume for a second that the pennant is real. Who would have carried it? Only the following BDM/JM organisational structures were permitted to carry pennants like this one with the post-1935 numbering convention xx/xx:
Mädelschaft / Jungmädelschaft (not numbered)
Mädelgruppe / JM-Gruppe (numbered but roman numerals were not used)
Untergau /JM-Untergau (numbered - again, no roman numerals were ever used)
The only structure within the BDM/JM with roman numerals was the Mädelring / Jungmädelring. However, neither of those two structures were authorised to carry pennants. Let's assume though that the paper label has always been there. Ostensibly it denotes the pennant as a pattern piece made for approval by the RJF. If true, what does that tell us? That there was a plan by the RJF in 1943 to change the flag/pennant regulations to authorise a JM formation (with roman numerals) to carry a new Wimpel? Not for me.. Well, certainly not until some evidence becomes available.