With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cwrIfManfDate
cwr If Manf Date
1.3.6.1.4.1.9.10.52.1.1.2.1.9
This object represents the manufacturing date of the IF subsystem.
Back to CISCO-WIRELESS-EXP-MIB MIB page.
IPHost Network monitor allows you to monitor cwrIfManfDate on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.