Halves in BDX?

[MatthewB]

Roughly when did chateaus begin using 375 bottles regularly?

Matt

[AKR]

I have seen splits going back to the 60's but don't have a sense on how prevalent that kind of bottling was.

Generally they are consumed younger, so there should be less of them (proportionately to larger sizes) as time goes by.

Are you curious about something specific?

If so specialists in old & rare wine, like Maureen Downey or Mike Jessen or Ben Nelson, might be worth pinging.