Emperor Shōwa (Hirohito) of Japan and Empress Kōjun (Nagako) made a state visit to Britain from October 5-8, 1971. To greet them at Victoria Station, Queen Elizabeth wore a peach hat with tall, rounded crown and wide, rolling brim.
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Royal Hats 
This is a very skilfully designed hat, because the brim is really quite large, but the Queen’s face remains visible without any difficulty, which is crucial in her role.
Is that Princess Anne shaking hands in the 4th photo of the last gallery? I feel like we’ve seen that same hat not too long ago!
HQ, hat #48 was also worn in Vancouver! Here’s a nice close-up of it. It would be a “peachy” Easter hat!
May 7, 1971: Canada (Scroll to the 2nd photo)
https://www.dailymail.co.uk/femail/article-1306648/The-Queen-I-A-treasure-trove-seen-photographs-Elizabeth-II–captured-readers-years.html
Agree crown is a bit high but overall the hat is nice. See such a resemblance to Princess Margaret who also looks so nice in these pictures. Honestly like the past hats better than in the hats in the present years.
Hope the Queen is well.
The crown is a bit tall, but that swooping brim frames HM’s face so well! Wish we had gotten more looks like this.
The combination of the tall crown and wide rolling brim make this hat rather overwhelming for a petite queen.
Such a change in tone for the 70s. Instead of the plain outfit and fussy hat combo she’s stuck to for a decade or so, the hat is now plain too – and brimmed which is unusual. I wonder who made it?
It’s actually rather lovely, a very elegant look.
This seems quite a departure in terms of shape for Queen Elizabeth but I love the peach colour and the wide brim. I like it in profile in some of the carriage shots.