There will be a little extra problem here, the frequency of the power line. You will eventually get lower life from the compressor motor because although changing the voltage is a simple trick it is not easy to change the frequency. UK and European, and most electricity around the world is shaped so it has 50 cycles per second, called 50 Hz. North American electricity is different, and is at 60 Hz. So the motor in your fridge will be overspeeding at 60/50 or 6/5 or 120% which will eventually overheat and lower its life. Make sure that when you install it you have LOTS of air around it so it can cool.
Since you bought a refrigerator it will have a motor, to run the compressor which makes the air cold.
I'd be a little surprised if a commercial unit which has been part of a lot and the eventually auctioned off has the information you want on it, but since it is a refrigerator I would be astonished if it is rated at anything other than 220-240vac, 50Hz. If it is inefficient as many old things are (I know I am for example) it may also use a fair number of Amps, which will double when you halve the Volts. You won't want anything sharing the circuit until you see how it behaves.
Halving the voltage is pretty straightforward. Down to Fry's or similar electronic store and buy a step down transformer with 220 input and 110 output, which you plug the fridge into and then plug into the wall with the built in cord.
Something like:- https://www.frys.com/product/3696575;jsessionid=zm5htlrnLO9zr9sjnZpl7w_.node4?site=sr:SEARCH:MAINRSLT_PG
Do see if the plate (probably on the back of the fridge) is legible. If you don't know what it means you could copy it here and some of us understand it (Ken and myself and probably others). You are particularly interested in xxxVac, xxHz, and xxA or xxxxW.
Does the fridge have a standard 3 prong large British plug or is it just three loose wires where you would expect a plug?