St Ives Leach pottery …..Atsuya Hamada?

Good afternoon,
I recently bought these three auctions in the same lot together with some old Leach pottery books / pamphlets from 1952-1962.
I bought them because I believed they were by Atsuya Hamada and comparing the pourers from those sold by Richard Batterham’s Durweston estate I believe there is a case to be made but wondered what your views are whether in agreement or not.
They are most certainly not Leach Standardware but all of them have the St Ives leach stamp together with the England stamp.
Thoughts?

Bowl

Cut sides vase / bottle

Well the one he produced which Batterham had according to his notes was one Atsuya produced in 1957 so yes definitely!

Atsuya Hamada (1932-1986)a stoneware teapot and cover, ovoid with side handle, covered in a tenmoku glaze,unsigned10cm. high (2) ProvenanceThe Estate of Richard Batterham. Catalogue notesRichard Batterham recalls this was the first side-handled teapot Atsuya made, in 1957.

That was from the auction you identified at W & W

Hi Philpot,
I concluded something similar largely because the sample of comparable known work is limited for the cut sided example compared with the tea pot / bowl.
Those two do sit well together and the thin incised rings on the bowl are found on some of his other work.
I think they were all from the same time frame
I like the vase the best of the three pieces. I haven’t got the potters knowledge or expertise and I can only look at known examples and naively compare them with mine. I looked at the examples in the Whybrow book but they are very different. Hard to tell but interesting nevertheless.
Thanks for your assistance
Neil62

Yes it is and I know that Leach had a kiln used for salt glazing which I have considered - it apparently was hardly used!

Philpot - you are very studious young fellow.
Interesting thought.
Mmm - I’ll ponder that one - I love research / investigation but hate going down a rabbit hole - if you know what I mean. 
The interesting thing is that there were a couple of pamphlets / old books which came in the lot relating to BL (potters book) and the same vendor submitted a jam pot by BL (the iconic one) which I bid on but thought it went for too much and this lot was on the rebound from that though I had seen the photographs of the Durweston tea pots and thought it worthwhile as a punt if for nothing else to further my education - bit like the Cardew pot!
The pamphlet by BL written in 1952 crystallised in my mind what I thought about the Oak leaf on standard ware being incised by BL (something remarked upon by Warren McKenzie in the Marty Goss film). 
In the pamphlet there are several photographs of his work and descriptions. The descriptions identify work at Leach who they were designed and produced by. There is a celadon porcelain tea service with the oak leaf on the tea pot. BL relates to it as ‘designed’ by BL whereas for example the pagoda decoration on a Leach bud vase ‘designed & decorated’ by BL.
All good
Thanks for the thought and conversation
Kind regards
Neil62