31′ Bertram Sport Fish

31' Bertram Sport Fish

Priced to Sell








Twin Gas

Hull Material


BVI Yacht Sales Overview

1964 31′ Bertram Sport Fish ‘Double Diamond’

This true classic, 1964 Bertram 31 ‘Double Diamond’ is one of the few classic sport fishing vessels in this region. Designed and built for serious fishermen over 50 years ago, paving the way for the “Deep V Hull” design that we find in the majority of modern sport fishing vessels today. The Bertram 31 has become legendary for their ability to handle big seas in relative comfort and safety. But another attribute that is absolutely necessary for a successful fishing boat is its maneuverability. The 31 is easily controlled whether in head seas, following seas, backing down on a big fish or docking at a marina; yet another reason for their loyal following be it for fishing or cruising with family and friends.

‘Double Diamond’ has been professionally maintained and recently received a full refit the from the hull up in 2018 including NEW Mercruiser 425HP 496 HO 8.1L engines with only 180hrs on them (Comfortably cruising at 22kts and capable of speeds reported over 40 kts!), all new wiring, new interior amenities, new enclosure for flybridge, new Awlgrip and all while keeping the traditional look and a number of the original Bertram chrome accents. (re-chromed in 2018) The owner prides himself on the attention to detail that has gone into her recent refit and upkeep. She is a fishing enthusiast’s dream boat, perfectly set up to island hop or stern to a beautiful beach with the family.

‘Double Diamond’ will turn heads and receives compliments anywhere she goes. But she is not just a dock queen, she is an excellent family cruiser and serious sport fishing machine! 

  • V-Berth with full upholstery and comforts
  • New mattress (2018)
  • Fusion Stereo
  • Manual Toilet
  • Reading Lamps
  • Storage Pockets
  • Pressurized Fresh Water
  • Custom Cabinets and Countertop
  • Custom Cabin door & hatch
  • (2) House Batteries
  • (4) Engine Batteries
  • 12 Volt DC 
  • 120 Volt AC
  • Inverter/ Battery Charger
  • Shore Power Cord
  • Engine Alternators
  • Mercruiser 496 HO 8.1 L Inboard Motors – 425 HP! –  180 Hours each (New 2018)
  • (2) 3 blade stainless steel propellers
  • Engine alarms and gauges
  • Fuel Filters
  • Hydraulic Steering
  • (4) Electric Bilge Pumps
  • (3) Fire Extinguishers
  • Bilge Blower
  • Custom SS Flybridge tower (New 2018)
  • Bow pulpit and hand railings (New 2018)
  • Full deck awning (New 2018)
  • Twin Helms: Flybridge & Doghouse 
  • Rupp Marine outriggers
  • Fighting Chair
  • (8) SS Rod Holders 
  • Chrome Blower covers
  • Chrome Bertram letters & Emblems
  • Full suspension helm seat ($4500!) 
  • Swim Platform w SS folding swim ladder
  • Deck Flood Lights
  • Lewmar electric windlass
  • Lwemar SS Anchor
  • SS Deck & cockpit cleats
  • SS Housers in cockpit
  • LED Curtesy lights throughout the vessel
  • (2) Large in deck fish boxes in cockpit
  • Custom Cockpit Upholstery
  • Fold Down Cockpit Steps
  • Bennett Hydraulic Trip Tabs
  • Backlit Double Diamond on transom
Yacht name

Double Diamond



Length Overall

Engine 1

Engine Make
Engine Model
496 HO 8.1L
Engine Year
Total Power
Engine Hours
Engine Type
Drive Type
Direct Drive
Fuel Type

Engine 2

Engine Make
Engine Model
496 HO 8.1L
Engine Year
Total Power
Engine Hours
Engine Type
Fuel Type

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Nanny Cay, Tortola, British Virgin Islands
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