Does 42T3143 in pkg w/"Made in China" == rebranded Chicony?

[miamicanes]

I'm looking at a new keyboard on eBay that's supposedly a 42T3143 (NMB's FRU) in what appears to be the original packaging from Lenovo, but the label clearly says "Made in China". Should I take that as fairly major evidence that it's really a Chicony (which ARE made in China), and not a NMB keyboard (made in Thailand)? (I'm trying to buy one of each so I can decide which one I like best, and already have a Chicony)

[Binh]

Can you see a blue rubber under the arrow keys? If yes, then it is NMB keyboard.

From T6x series, we don't have Thailand made NMB keyboards. They were only in T4x series.

[RealBlackStuff]

Look at the back of the keyboard. If there are lots of holes in it (like under every key), it's a Chicony.
AFAIK later NMBs are/were also produced in China, with similar or same quality as the Thai-made boards.