What would you wear to this wedding? 👰🤵

The invitation says to "wear your best vintage attire". When my husband read it to me, my first thought was the 50's. If that's the case, I have the perfect outfit in mind. But on the invite, it has a clipart image of an early 1900's couple.

I plan on having my husband ask his coworker about it, but considering it would be him and the groom having that conversation, I'm not too sure how helpful that will be for me.

I'm also torn because I don't know what everyone else will wear. I don't want to show up in "vintage attire" and everyone else is just wearing normal wedding attire. So whatever I wear, I want it to look vintage enough to where I will fit in if everyone else wears that, but normal looking enough so I don't stand out if no one else wears vintage attire.