Butterick 8576; 1950s; Misses' and Women's Scoop-Neck Spectator. Step-in spectator with a bloused bodice and a collared scoop neckline. (A) Three-quarter sleeve version with contrasting over-collar and tab cuffs. (B) Short-sleeve version.
Links to reviews/blog posts
[insert your username, and make sure your preferences allow for people to contact you via e-mail. Do not list your email address here!]