Heineken’s Bok was one of the stronger examples. I was surprised to see that those of some competitors were under 6% ABV.
The Phoenix example in particular kooks understrength for the style, both in terms of gravity and ABV. The Drie Hoefijzers beer has an ABV only a touch higher, but at least it’s 16º Plato. I’m surprised at the variation in gravity. I would have expected them all to be 16º-16.5º Plato.
Even more of a shock are the colours. Or one of the colours, I should say. Assuming that they’re using the Brand scale, there shouldn’t be anything paler than 12, which is the equivalent of 79 EBC. Drie Hoefijzer’s looks to be too pale for the style.
The rate of attenuation is mostly under 70%, which I guess isn’t unusual in a full-bodied beer like Bok.
|Dutch Bok in 1939|
|Brewer||Town||OG Plato||FG Plato||ABV||App. Atten-uation||Colour|
|Rapporten van laboratoriumonderzoeken naar producten van Heinekenbrouwerijen in binnen- en buitenland en naar producten van andere brouwerijen held at the Amsterdamse Stadsarchief, document number 834 - 1794.|