The Oakshaft was a broom created by Elias Grimstone in 1879.
The broom-maker, who hailed from Portsmouth, crafted this heavy, reliable broom specifically for long-distance flights, where any high or volatile wind conditions could make it dangerous for a rider on a lighter, less stable broomstick (QA9).
In spite of its thick handle, the Oakshaft 79 is considered to be a good-looking broom (and is much sought after as a vintage collectible), but it is too slow to be used to play Quidditch (QA9).
In 1935, Jocunda Sykes crossed the Atlantic Ocean on an Oakshaft 79 – the first rider on a broom to do so (QA9).
The "mighty oak" is often used as a metaphor for the strength and solidity of people of England. As a wand wood, English Oak requires a wizard or witch with attributes of "strength, courage and fidelity".
Lexicon list of Broom Manufacturers
From the Web
Pottermore feature: Broomsticks
Harry Potter Wiki: Brooms
Tags: design distance endurance firsts flying heavy journey large slow wood