Hmm, querying the Eurocontrol database gives the following:
NOTAM SUBJECT TO QUERY. MULTIPLE AD IN ITEM A
ACFT TAKING OFF FROM SBGR OR SBGL DESTINED FOR KMIA,KORD,
KATL,SVMI AND KJFK INTENDING TO ENTER AMAZONICA FIR, THROUGH
ROUTE UZ23 AND UL304, IN THE PERIOD COMPRISED BTN 0300
AND 0630 UTC MUST FLY THROUGH THE FLW PREFERRED RTE:
- TKOF FROM SBGR - UW2 BRS UZ24 STM DCT BUVIP (N0122.25/W05913.60)
DCT BVI UL304 ISANI
- TKOF FROM SBGL - UA312 STM DCT BUVIP (N0122.25/W05913.60)
DCT BVI UL304 ISANI
K1470/09
FROM: 20 SEP 2009 16:54
TO: 19 MAR 2010 23:59
Could QTR denote "NOTAM SUBJECT TO QUERY. MULTIPLE AD IN ITEM A"?! No clue. QTR as a Q code denotes a request for the current time... doesn't lead any further.