Flash from the Past {Technology}

I'm not sure how old this flash unit is.  But I found it along with a small single light at the thrift store awhile back.  Total for both pieces (other light not in photo) $7.49 including tax.  It's definitely a flash into the past for photographers.

ISO 400
SS 1/40
Fstop 4
Sigma 30mm 1.4
580EXII