(x) Technical / Engineering Font - Helvetica Extended {Jan}

Hello! I've been trying to track down a good font for the technical drawings I work on. I came across a document that has exactly what I'm looking for. See attached. Sorry for the quality. It was taken from a scanned document and the print was quite small. Any help would be greatly appreciated! I've tried to find something myself but have had no luck. Thanks!

Comments

Helvetica Extended?

That's exactly it! Thank you!