By Benéteau standards this model had a long production run, beginning in 1983 and ending in 1989, during which period 520 hit the water. She has many similarities in layout terms with the First 285 except that she was rather more comprehensively fitted out. She has a forward-facing chart table and more shelving. Keel and rudder design was a generation earlier than the 285, which was the quicker boat.

LOA 8.7m (28ft 6in), LWL 8m (26ft 3in) beam 3.20m (9ft 11in), draught 1.05m to 1.8m (3ft 5in to 5ft 10in), or 1.68m (5ft 6in), displacement 3.000kg (6,600lb). Price guide: £25,000 to £30,000 YM Test report July 1984.