2006-2009  Caldera OasisI and II Model TRI OR TOB TRI OR TOB2 and Hot Spot Trinidad  Model TRI and Tobago Model TOB a  is indicated by the letter in the serial number. for example. Caldera Models Serial Number  OAI OR OAI2 or TRI or TOB2-3D2015 the serial number would read TRI OR TOB is model  3 third quarter H year(2006) and 2015 is the unit number made. Serial Number  OAI OR OAI2-3G2015 the serial number would read TRI OR TOB is model  3 third quarter J year(2007) and 2015 is the unit number made. Serial Number  OAI OR OAI2-3F2015 the serial number would read TRI OR TOB is model  3 third quarter K year(2008) and 2015 is the unit number made. Serial Number  OAI OR OAI2-3G2015 the serial number would read TRI OR TOB ..
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