Nikonos Speedlight SB-101 with Sensor SU-101 in nice condition

NIKONOS Speedlight SB-101 with Sensor Unit SU-101 and flash diffuser.
Light output control : Automatic silicon controlled rectifier ( thyristor) and series circuitry using sensor Unit SU-101.
Guide number ASA/ISO at 100 and meters : on land Full power 32 / ¼ power 16 . Under water full power 16 . ¼ power 8.
• Angle of coverage for a 28mm lens. Angle of coverage (with diffuser) 15mm lens.
• Three manual mode settings : Full, 1/4 to 1/16 power depending on distance.
• Usable apertures : Manual mode – f/2 – f/22
• Flash sync with Nikonos-V : 1/30, 1/60 and 1/90 sec.
• Flash ready light provided.
• Accepts four AA batteries. Nicads provide a minimum of 50 flashes with an approximate 6 sec recycling time. Alkaline-manganese batteries provide a minimum of 130 flashes but the recycling time increases to 9 sec
The speedlight is in good condition, no leakage found , no cracks. All functions work as they should.