Honeywell #T87N1000, Round Non-Programmable, 1H/1C, Mechanical Thermostat
The Round T87N thermostats provide electronic control of 24Vac heating and cooling systems with the classic twist to set dial.
Separate temperature setting and thermometer
The T87K heat only works with 2 or 3 wire heat only systems
The Easy-To-See has enlarged scale and raised numbers plus it clicks at every 2ªF change