GSKY GS-27USB

There are likely many different boards used within these things and chipsets may potentially vary. A good number (.. including this one) may possibly be counterfeit / fake.
 * The one shown in this entry would seem to be from whatever group made / sold the Wifly-City stuff

The label states the CoO as Taiwan.. but that may be questionable for some.
 * The URL on the adapter is http://www.gsky-link.com/. It's long since perma-down, but it's still available via archive.org.

Additional external links

 * RTC6691H info page on Richwave's site

dmesg dump
usb 3-2: new high-speed USB device number 15 using xhci_hcd usb 3-2: New USB device found, idVendor=0bda, idProduct=8187 usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 3-2: Product: RTL8187_Wireless usb 3-2: Manufacturer: Manufacturer_Realtek_RTL8187_ usb 3-2: SerialNumber: 000F04B288BB ieee80211 phy12: Selected rate control algorithm 'minstrel_ht' ieee80211 phy12: hwaddr 00:0f:04:b2:88:bb, RTL8187vB (default) V1 + rtl8225z2, rfkill mask 2 rtl8187: Customer ID is 0x00 rtl8187: wireless switch is on