Good photos, but is that uniform supposed to be from the CSS Shenandoah?
Some features seem suspect, namely the name tag on the front of the cap as that really wasn't thing yet for American sailors during the CW period. Plus the CSN had moved over to gray by the time Shenandoah was commissioned, and I'm pretty sure denim wasn't used for jumper capes back then as that one looks to me made of. Plus the construction of the cap and what I can see of the jumper doesn't look quite right, and in fact looks like they were made long after the CW.
Judging from the photos, my first thought is that their not period, and may be some 1960's ensemble to represent what CW sailors wore. But hey what little I can see of the monkey jacket looks right.