Looking for help identifying two Pro Micro "eBay specials" - 3.3v or 5v?

I picked up a couple of cheap Pro Micro’s off eBay a while back (http://www.ebay.com/itm/310634777706). Both are blue, and have no brand identifier on them (ie, Adafruit, Sparkfun, etc.).

My challenge here is that I couldn’t seem to get them to be identified by the IDE, so I’m trying to figure out just which they are.

Here’s a summary of what I know…

  • eBay item description says 5V
  • The boards are marked “V11”
  • The voltage regulator on the board is a mic5219 labeled LG50 (which is 5v). This matches what would be on a V11 board I believe.
  • The spot on the back where one can mark “5V” or “3.3V” on the circuit is NOT marked
  • The schematic (http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/Arduino/Boards/Pro-Micro-v11-5V_B.pdf) states for the jumper “Closed for 5V version”
  • The J1 jumper is NOT closed, which implies… it is 3.3V?

So I’m wondering if they are 5V versions that never had the jumper bridged, or if in fact they are 3.3v versions that got mis-labeled in the eBay description.

Any suggestions on how I can precisely identify the boards?

Here are a few pictures…

The two boards…

The board top showing the voltage regulator (5V version I believe) as well as the not-jumpered J1…

V11 label as well as non-marked 3.3V vs 5V…