Flush and recessed displays of hp 27s calculator.

[Rafa]

Does anyone have any information about the two versions hp 27s with different display? there are a similar two different displays in hp 42s, one flushed and other recessed, the latter has a better contrast and readability (there's a youtube video about the 42s comparing the two side by side).

Is the version of the 27s with the recessed display is also, like the 42s counterpart, better than the flushed version?

Any body knows anything about these two versions in hp 27s?

cheers.