Inaccurate transformed values

 Hi All,
I'm new to spatial. Started to deal with because I need occasional transformations to/from SRID 2065 and 8307. I tried some coordinates and I always get 100-150 meters of difference. E.g.
SELECT sdo_cs.transform (MDSYS.SDO_GEOMETRY (2001, 8307, sdo_point_type (14.3537417, 50.774844, NULL), NULL, NULL), 2065).get_wkt() as res FROM DUAL;
RES                                                                            
--------------------------------------------------------------------------------
POINT (737206.841988616 966766.614400023)                                      
1 row selected.
But the good is (737106, 966617).
I checked all the parameters and WKT (based on spatialreference.org) but they are all OK.
Database is 32-bit windows, 10.2.0.5.

Any suggestions?
Thanks