1940s, the decade I believe the quilt top was begun.
These stylized flowers in purple and blue seem very 1950s or 60s to me.
The fabric in the center of this block couldn't be more 1950s if it tried! And I think the floral in the triangles dates to the 1950s, maybe 60s. I'm pretty sure this whole little block was a patch. The way the edges lie certainly helps me believe that. Plus it's not quilted!