An original office/business telephone switchboard. This system probably still works given some TLC and a power supply (missing, not included). There are some resources available on the 'net for technical aspects, installation and maintenance. This item is quite heavy with it's internal electronics and workings. Great for a collector or for parts. A truly well built and unique "blast from the past" and would be very kool in a home, game room or "mancave" (whatever that is). Being sold as-is, where-is in Knoxville TN. $800. Better photos can be made available on request- if you leave a message, I'll have him return your call soon!