Otis clone or just a very common button style?

Having looked at an official Otis Elevators illuminated button, I got a couple of similar ones from AliExpress to compare the construction.

These are visually nice buttons and have a solid feel due to the stainless steel actuator, albeit that it’s pressing a fairly standard tactile switch. The 24V LED circuit restricts their use in lower voltage circuits. (Elevators and other industrial equipment tend to use 24V DC control circuit power.)

The connector and pinout is different to the Otis one, and bizarrely the three wire version versus the four wire one just has two pins shorted with a blob of solder as a common +24V.

The other oddity is the plastic retainer being a snap fit onto the stainless steel button. I wonder if those plastic parts crack much.

Here’s the link I got the buttons from. Note that there are many other sellers of similar buttons.

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