Any Ideas what this may be?

[RailwayGuy]

Hello, I am new I couldn't really find where to post this topic so hopefully, this place is okay.
If not please move me to a different location.

I've recently found this old Abloy key marked B27 and was wanting to find out how much there normally worth and
what there used for thank you.

[Riyame]

It is an early key for the S&G Environmental padlocks.

[RailwayGuy]

It is an early key for the S&G Environmental padlocks.

But it's marked ABLOY, not Sargent & Greenleaf

[Riyame]

It is an early key for the S&G Environmental padlocks.

But it's marked ABLOY, not Sargent & Greenleaf

The early keys were made by Abloy. There are even a few RARE locks that were made by Abloy as well.