I have never seen a QSL for this station.

Nauru - VR7AB
According   to   “Amateur   Radio”   for   August,   a   new   Nauru   station   has   been    posing   considerable   excitement   on   20   metres.   No   name   is   mentioned   but   the   story   goes   like   this.   The   Ham,   formerly    GM3DOJ   of   Scotland,   applied   for   a   license   for   Nauru   but   was   vetoed   or   stalled    by   the   Post   Master.   He   then   applied   over   the   head   of   the   Post   Master,    presumably   to   Australia,   and   was   issued   with   the   call  VR7AB—a   prefix   never   before   released—and   forthwith   got   on   the   air,   with   devastating   DX   results.  
 His frequency   reportedly   was   completely  blocked   with   W’s   and   K’s   either   calling,    working,   or   just   jamming   him,   declaring   him   to   be   a   pirate.  The   Post   Master,   according   to   the   story,   has   been   returning   all   cards   sent  to VR7AB,   declaring   there   to   be   no   such  statlon.   Until   the   matter   is   cleared   cards   should   go   to   VK2YC,   the   NSW   QSL  manager. The   station   apparently   first   appeared in  June,   but   nothing   has   been   heard   of   him   in   Auckland   during   periods   when  Pacific   stations   have   been   well   received   the   evenings   in   August,   so   possibly   the  Post  Master   is   temporarily   in   control!  
--Pacific  Islands  Monthly, September 1, 1952, p. 95.            
                                                           -o0o-
The  DX  ethics  of   some  of   the  W  stations  on  one   or   two   rare   ones   that   appeared,   namely,   VR7AB,   FR72A   and   FK8,   made    one   wonder   just   what   is   happening   to   the   Ham  spirit   as   it  used   to  be  known.    A   W7  for  one  example,  moved   his  Tx  back  and  forth  over   more  than  5   Kc.   of   an   FK8,   calling   all   the   time,   thus   effectively   making   sure.   If  he   did  not  get   the   station,   others  would   not  either.   Later   in  the  notes   mention   will   be   made   of   VR7AB.    The    goings  on,  on  this  poor  guy's  freq.  were   amazing.   Even  the  days  he  was  not  on  the  air,  he  was   still   being   called   blind   by   one   or    two.    When   he  was  on,   those   who   missed  out,   carried  on  back  chat  on  his  own  freq.,  appeals  from  VR7AB   having  no   retarding  effect.
--"DX Notes by VK4QL," Amateur Radio (Australia), August 1952.
 73, Bob, W5KNE

According to CQ August 1952, VR7AB was giving his name as Bob Freeman.There is no GM with the name Freeman and says he was an ex G station in the 1954 Radio Amateur Call Book.
G3DOJ was W. J. Omer.
The only G station with initial R is G3AXV (F. R. Freeman). G3ITF was B. S. Freeman.
There are no Freemans listed in the 1954 CB for GC, GD, GI, GW.
I concur this was likely to be a pirate operation. 5B4AHJ

Courtesy of W5KNE, 5B4AHJ