Takumar 500mm f/4,5
Asahi Pentax 1957 - website with great information on early asahi pentax cameras and takumar lenses.
Asahi (Pentax) Super Takumar 135mm 1:3.5 – Test
PENTAX 67 + SMC-TAKUMAR 2,4/105 + CDS-PRISMA
Super Multi Coated Takumar 1:3.5/135
My first 35 mm SLR was this Asahi Pentax Spotmatic that I bought in 1967.
Pentax 67... always wanted one.