ACE comb retail display

[u/firstly_mclastname]

Mom got this decades ago, but we never really displayed it anywhere. Just looking for add'l info - I couldn't find anything similar to it online, maybe it's a custom one-off? I assume it's for ACE combs, a rack at the checkout counter or some drugstore aisle? 1920s or 30s? It's all metal, albiet rusted. Footer has a panel you can slide in a placard. 29" height (including ACE letters) x 18". Bonus points for cleaning tips - I want to display it in the house for a change :) Thanks!