" Silicon Valley days..."
(High tech Techie!) 
 
Photomask verification work using an scalar, occular lens.  "Low power L567" integrated circuit, at 250X metric.
Robert C. Kuhmann, Manager IC photomask Design Group
1974-1981 while with: Exar Integrated Systems, Inc.
(photo circa 1979)
 
INTEGRATED CIRCUITS
Quad Op Amp - micro-photograph
Quad Op Amp - the  actual layout
Display  Driver - micro-photograph