This is a Germany Rollei -- gelb -- mittel.Camera lens. This was used by my late uncle and now he is no more. I have no knowledge of this if you know this can work with your device. Contact me through sms.
Will ship outside Nairobi to. Some information below is extracted through the net.
Kept in good condition. As shown in pictures exactly.
Bayonet 2 Rollei yellow filter (medium yellow)
This Rollei medium yellow filter (Rollei-Gelb-Mittel II) fits lenses with a bayonet 2 mount.