The one on the second pic is definitely a Bourns
DL the datasheet here: http://octopart.com/51aad-b28-e18-bourns-1027454
As for the first one, I don't know...
If the "L 136XX" is a manufacturer code, I don't know who 136 stands for. Not Clarostat, which would be 140, nor CTS, which would be 137.
Edit: Bourns manufacturer code seems to be 381. But maybe it's just a serial number....?