Saxon Classic Model no 813

I was bought this classical guitar in the 1970s. It's in excellent condition as I didn't play it very much. The label inside reads 'Exclusive to Selmer London' and it was made in Japan. It has mosaic inlay in three places, scrolled machine heads, and is made of two colours of wood.
Can anyone advise me on what it might be worth these days please?
Thanks.

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