I'm sorry I can't directly answer your question but I thought I'd post an interesting fact I've noticed w/ the Disclaimer I was not [even] born until 1980. I've always had a fascination with Perry Mason as it seems to be a highly regarded, particular let alone it is still a "defacto court room drama" (and all that that entails) That many other courtroom dramas, even today, Make this series as it seemed to really set a bar or rather, the bar for this style of show. I know that attorneys today, I've read Kama regard this as almost the the standard by which behavior in a court Room to this day is handled. It's rather amazing, to this day/almost 2020 (in just 6 mos) some 60-ish years since its inception. At any rate, speaking of a "Form of Art/Design," no doubt most reading this post are familiar w/ "DECORA"-Style Receptacles (I.e. Lights and switches that became very popular in the nineties and well into the 2000s. According to "patent-history," LEVITRON is the inventor of this [still] modern-style receptacle. They Patton did it in 1972 or 1973 sources differ but around that time period so my question would be, how could this design show up some 15 years before it was even "patented??? What's interesting is the Decora switches are in Perry Mason's office, are circa late 1950s! How can this be? I realize Such things are just "props" & most - if not all, things are in circulation before they actually have a pattern i.e. They are in patent pending status. However, I have done some research and there is no indication that the current the chorus style or any variation thereof, was used before 1970 in the United States. Yet I have pictures, screenshots, of the core switches in Perry Mason's office, I'll be at studio office but office nonetheless. A my note that the the chorus which is are a bit smaller than the current popular ones which, really were in vogue in the late 1990s and early 2 thousands and are commonly used in houses today signifying the home is a relatively NEW home. That is to say, homes Built-in the seventies and eighties generally were NOT EVER outfitted with Decora style receptacles. These are square light switches that are rockers and plugs that are rectangular. An example of this would be the switch is sold at any home depot or Lowe's home improvement center like this SECURE LINK:
https://www.homedepot.com/p/Leviton-Decora-15-Amp-Single-Pole-AC-Quiet-Switch-White-R72-05601-2WS/100058788
Unfortunately this chat does not allow me to post pictures, which I have so in lieu of this I will cite an example if you care to see. And the very 1st season of Perry Mason, Season 1, Episode 17 Entitle the case of the Sun bathers Dari, the female Sun by their comes to Perry Mason's office and explains her dilemma. After, or rather, as she's leaving the office at the 6 minutes and :59 seconds "mark" if you're watching this on a "STREAMING PLATFORM" (sans NO COMMERCIALS!!!) like the ever-growing popular Amazon Fire TV (Note: the 2019 AMAZON-TOSHIBA Fire 4K, UHD, HDR TV is the VERY BEST among the various models now out; do NOT buy the cheaper, CHEAP, HORRIBLE QUALITY "Insignia brand... Trust me, I'm a 15 year video producer and insignia TV's absolutely do not last that long. Even though the to shiba model is extremely affordable for all that it has, its manufacturing is still superior as it is amongst the ranks of its cousin, Sony. Companies like these to that have been around since the late 1800, yes, 1800 when they had telegraph, not even telephones) or the [now] less popular Roku,
( Which, personally, I don't think will be around in years to come as Amazon is literally taking over the streaming market. Even thibeault with its streaming capabilities is all but DO way! They barely have one model, the bolt, laughed and that is it. Their demise is number, very likely, in months, not years!!!).
Anyway, to that in it should be around 6:59 "into the show." When the Sun bather lady 1st leaves Perry Mason's office and is about to pull the door shut, very prominently featured to the right hand of the screen or her laughed said she is walking out backwards pulling the door closed, you'll see a Decora, or similar style I'll be it slightly smaller but still a Decora rocker switch.
Again, even though this is undoubtedly a prop, it's interesting that this is somewhat a form of art since it is a style that certainly was not popular in the 1950s. I know for a fact that homes were generally not outfitted with the chorus style receptacles until the 1990s through today/mid-2019. I'm genuinely curious as to how this current, relatively modern switch showed up in season one of Perry Mason which, for this particular episode, its original air date was January the 11th, 1958! That's almost exactly 15 years before level tanh Patton did and, moreover, the 1st time this switch was marketed I'll be at it was likely marketed in a limited fashion in the seventies and eighties for those rich enough to outfit their home with these receptacles since they were far more expensive when they came out compared to the standard switches of that era the 1970s through 1980s. Any thoughts on this anybody?