[Q
Are these spittoons?
detail
To be honest, I thought spittoons were a thing of the past by the 1930s.
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There are circular shaped changes in the flooring under them. I think they are to keep carts, vacuum cleaners, etc from banging into the stone on the corners of the counters and chipping it. Spittoons seem passe' by then to me too.
Or... they are bases to hold the velvet ropes they have in banks for lines before those plastic retractible seatbelt sort of things