That model is my favorite Parnis.
Yes, it does seem that model has (or at least had) a Sea-gull movement:
‧ Movement Diameter: 30.4mm
‧ Movement Thickness: 7.4mm
‧ Frequency: 21600 VPH
‧ Second: Sweep/Sub, date
‧ Incabloc Shock-resistant balance
‧ Uni -directional automatic winding
‧ Run-time reserve: 42 hrs.Review in Chinese.
I can't read it, but it has lots of good photos.