I'd not be surprised if it comes from the existance of '[Ideal] Standard' (the european branch of 'American Standard') brand toilets, someone seeing them and quipping about how it's a 'standard bog' and then 'bog standard, bog' is plausible, IMO).
Between 1929 and 1967, both American Standard and Ideal Standard often omitted the first word on their porcelain products, and just had 'Standard'.
The only real downside I see with this theory is that [Ideal] Standard were far less popular than Armitage Shanks in the UK, although American Standard purchased Armitage Shanks a while back.
Between 1929 and 1967, both American Standard and Ideal Standard often omitted the first word on their porcelain products, and just had 'Standard'.
The only real downside I see with this theory is that [Ideal] Standard were far less popular than Armitage Shanks in the UK, although American Standard purchased Armitage Shanks a while back.