Eagle Strongbox Key Code - Help Needed

[Robotnik]

Wondering if anyone can help me out with an Eagle key code:

1SVVBL

As far as I can tell, this is a 4-pin lock cylinder. Appears to be close spacing specs. Impressioning hasn't been successful for me. I have an Eagle padlock code book, but this one's not covered.

Appreciate any help anyone can provide!

[billdeserthills]

I looked in an old shop code book, unfortunately your code was not shown in my book
you might like to try asking around on the antique lock forum at www.antique-locks.com

[Robotnik]

Appreciate your checking!

[jimu57]

Was Eagle bought by Ilco?

[Robotnik]

Was Eagle bought by Ilco?

From what I've read, Eagle ceased operations around 1975. Some assets were sold to another lock maker; forgetting which one, but may have been Ilco

[billdeserthills]

Eagle made locks for the military and other secure applications and they did not release many of their codes.
Best bet is becoming more proficient in impressioning