Lord and Jacobean are the same designs,
Is it the case that it's Lord when made by Inwald, and Jacobean when made by Davidson?
I have an interesting anecdote regarding this pattern!
I found an old (circa '46, I think) hardback copy of one of Gerard Durrell's books, very nicely illustrated with line drawings.
The book was about some of his travels in Africa in, what were at the time, somewhat remote places.
There was an illustration of him sitting outside at a rough table with a local chief, sharing a drink.
The shot glasses sitting on the table were Lord/Jacobean.
