Has anyone seen this little guy before?

[M.C.Glass]

I spotted this one and bought it because it had a prioff top. It’s 4 1/2 or 5oz, machine made. I think it had a paper label. But what was in it? The only mark is a tall, narrow diamond with a dot in it, and a 4 beneath. Help!

 

[nhpharm]

This is not technically a Priof closure. I believe the bottle would have taken a Kork-N-Seal top. Would have contained some sort of medicine.

 

[M.C.Glass]

Thanks!