ring man

or ring·man

noun
  1. Printing. an operator of a ring machine.
  2. a person who assists an auctioneer by spotting bids and signaling the information to the auctioneer, often from the ring where livestock is displayed for sale.

Origin of ring man

First recorded in 1475–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018