Vintage 1960s MOD DRESS in Black & Plaid with Long Sleeves by Stacy Ames one of the four sisters

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1960s Mod Dress in Black & Plaid with Long Sleeves by Stacy Ames one of four sisters.
The fiber content seems to be a wool/poly blend...however, there are no labels to indicate this.
This gorgeous vintage dress features a crew neckline and long sleeves (one sleeve is adorned with the original buttons, but the buttons are missing off the other sleeve).
Zip closure at center of back. Original belt for around the waistline.
Vintage size 10. Fits like a modern size 2.
There are some stains and damages, as pictured. Not sure if stains can be cleaned out or not. The damages are minimal that I'm able to tell, and could easily be fixed by someone who knows how to sew. (Two belt loops have loose stitching, arm sleeve seam is coming loose, tiny hole in fabric).