Vintage Tie Bow Purse in Cream/off-White

Vintage Tie Bow Purse in Cream/off-White Brassy colored chain Convertible: Can go from clutch to over-the-shoulder to overarm Leather-like appearance/has no indicators inside the purse to determine material make-up or maker This could be from the 40s or 80s it has a look that fits both those periods/ what say you fashion historians, what era is this purse from?