vintage victoria's secret satin square neck dress

i mean... just look at that old school tag. the size tag is super faded but i can faintly make out an "L"... so we'll call this a large. it's a satiny material that has survived many machine washings from me. this dress is pretty short so i wear bike shorts under it. the base is navy (looks almost black) with white polka dots. no stretch! I've never seen another dress like this one.