Help dating vintage 2 pc. romper set

[Elanger]

Looking for help dating this adorable 2 pc romper set I recently acquired.

The playsuit is button up with shorts and then a separate button up shirt. No label, but appears handmade. Light cotton fabric and just so cute! It was sold as 60's but I feel like it may be earlier? Thanks!

 

[Azuli]

If say on the cusp, late 50s early 60s judging by the silhouette & pattern. Super cute!

 

[fuzzylizzie]

Yes, late 1950s, or possibly into the early 60s.