| Year | 1986 |
| Date | 22-Aug |
| Volume | 157 |
| Issue | 3,783 |
| Page | 203 |
| Category | Nautical |
| Part | 13 |
| Title | A Marine Triple Expansion Engine. The O.B.Bolton design |
| Author | J.P.Bertinat |
| Notes | Pump unit, air pump base, air pump cylinder, air pump cover, piston and rod, rocker arm bearing and pump rod guide, disc valve & seating |