Yet another old(ish) bottle from local beauty spot in the UK.

[Brommas]

I would love some thoughts on this bottle please, it's in very good condition, seal was intact and is actually still watertight. Found in a local beauty spot where I walk the dogs(no, the dog didn't find this I did). The company is Darvill and Baker, can't really find much online apart from a couple of decanter things from 1930 on Etsy, I would put these 1930-1950?, Would love to hear everyone's thoughts on relation to age please?, I think probably a soda?.