Mid-Showa era station signs and road signs

[Pashina12]

I've noticed that with most structure kits, what is included for road signs and signage around stations is suitable for late Showa at the earliest, but more often Heisei and Reiwa. My question is, are there such signs available for the mid-Showa period, i.e. late 1960s, early 1970s? Or is this something I'll just have to research and print on my own?

 

One thing is for certain, though, is that I'm definitely planning to use a few strategically placed Expo '70 promo posters on my layout as visual cues to the time period...

[Pashina12]

I just found this link about traffic lights in Japan: https://signal-net.sakura.ne.jp/sig_ago.htm, thought maybe this might be a useful reference for people...

 

The very first one looks much like the ones in the Tomytec Diorama Collection set Traffic Light A (015), and I found another thing that showed this type dates to at least 1968.