Van Lanschot share price and guesstimated value

Van Lanschot seems to be on sale at EUR 23 per share with a book value of EUR 30 and dividend of EUR 1,50 (7%). 

The https://en.wikipedia.org/wiki/Graham_number is also not usually used for financial companies like banks.

For banks and real estate, I have decided to use 1 x book value instead of 1,5 x book value which makes more sense for other industries. The Graham Value is the geometric average of 15 x Earnings per Share and Book Value x  1,5 (in this case x 1).

Conclusion September 2020: (@ EUR 16 ) was: You can buy a Euro for 54 cents? (https://sinaas.blogspot.com/2020/09/van-lanschot-kempen-share-price-and.html)

The price increased 44% since then. The price still seems reasonable today (November 2022).