Tom, great lobby card.
IMDB is pretty reliable and lists all five shorts as 1932:
http://www.imdb.com/name/nm0751899/?ref_=fn_al_nm_1
-- although "Over the Fence" has a separate listing as a 1920 production:
http://www.imdb.com/title/tt3033860/?ref_=nm_knf_i2
as well as a 1932 short:
http://www.imdb.com/title/tt0134010/?ref_=nm_flmg_act_5
There may well be two different films with the same title, both starring the Babe.