Can`t find part number for ASA by SN

[KonstantinRav60956]

Hi.

Trying to get part number of my ASA5516 to buy the same model but can`t find a part number on

cway.cisco.com/sncheck/

Got the SN from 

show version

tried a different one from chassis section of

show inventory

In both cases it shows me

Product

Product ID Unavailable End of Sale Not Announced End of Support Not Announced

What am I doing wrong?

[balaji.bandi]

Can you post full output of show version.

i am sure i can see as below when i do show version :

Serial Number: JXXXXXXXXXXXXXXXXXXX
Running Permanent Activation Key: XXXXXXXXXXXXXXXXXXXXXX