Solution
You can use command "show version all" and under Product Name you can find rbt_* where * is the device significance sh for Steelhead, ib for Interceptor and cmc for SCC or CMC :
Interceptor
Lab > show version all
Product name: rbt_ib
Product release: 7.0.0
SteelHead
Lab > show version all
Product name: rbt_sh
Product release: 9.6.0
SteelHead EX
Lab > show version all
Product name: rbt_ex
Product release: 2.1.0
CMC or SCC
Lab > show version all
Product name: rbt_cmc
Product release: 9.8.0