Question.....was the interior center tray w/hinged arm rest an option for the '74 2.0L model year? Was it part of the 473544 comfort equipment / appearance package option?

Jeff,

It was both part of the Appearance Group & a stand alone option.

Since most 73 2Ls early on had Appearance Group, that was less single option.

By 74 they'd decoupled the "included" options, so it was either or, & you need to check the window sticker &/or COA. Same for 75 & 76 MYs.

See my thread on the "914-S " in the O&H forum, &there are pix of ads for both the 73 "914-S " & 74 914-2.0 which IIRC lists the options, including the center armrest/cushion storage. I don't know where your option list above is from, but it seems incomplete on that & a couple of other items. Jeff Bowls by's website may have some Porsche dox from back then.

Cheers!
Tom
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Where did you get this list? It is incorrect, and what about the 1.8?
The wood vinyl covered map box with hinged top was only available in the appearance group and only with the three gauge center console. If no console then a plastic tray with fitted center set cushion optional

Thats from the Service and Training Manual. In 74 there was a separate 1.8L S&T manual.

Figures, came out before the cars were delivered. It is inaccurate. Some of the other 914 training manuals were inaccurate as well