Vintage 1960s Simplicity Size 10 6121 jumper dress

Vintage 1960s Simplicity Size 10 6121 jumper or dress uncut pattern bust 31 Jumper or dress pattern from 60s based on style Size 10 Bust 31 uncut - I didn't open the pattern completely but it appears that this has not been cut check the photos for the details - sizing/recommended material etc;