(x) GlaserSted Font Parent - Glaser Stencil, alternatives {Nick Curtis, Riccardo}

Need some help...

I love glaserSted font. It's freeware and can be found here:

[link removed by moderator]

However, I do not know the font that this comes from. I'm looking for the "parent" font that the author turned into a stencil type font. Essentially, I'm looking for this simple, sans-serif font to use with glaserSted.