The radiosource 4C39.25 (0923+392) is an 18 mag quasar with a redshift of 0.699. Throughout the seventies its compact structure at centimetric wavelengths consisted of 2 components separated by an angle of about 2 milliarcseconds (mas). In the eighties the structure has been found to consist of 3 components (Marcaide et al., 1985; Shaffer et al., 1987). The angular separation between the “a” and “c” components (see Fig. 1, which shows our most recent map of this source made at a wavelength of 2.8 cm) has remained constant at about 2 mas, while component “b” is separating from component “c” at a rate which we estimate from 2.8 cm observations as 0.18± 0.01 mas/yr, and which translates into an apparent linear separation velocity of 4.0 ± 0.2 c (HO=100 km/s/Mpc, qO=0.5, c is the speed of light).