Are these dates in the Chronology?

A very interesting letter written on Tolkien's birthday in 1969. I love the way that he states in the letter that he now lives by the sea but does not disclose the location, though the postmark may give a bit of a clue

I am also very envious that he sent them five signatures in total.

eBay Item #121699266605

Sorry, he sent us 4 signatures, not 5. I am now putting the letter and all the signatures up for auction at Bonhams

And no my letter is not in the chronology, because only Bridget knew about it.

However see

http://www.hammondandscull.com/addenda/chronology_by_date.html

3 January 1969 Tolkien writes to Bridget Mackenzie, eldest daughter of Ida and E.V. Gordon. He has sent her an autograph she has requested for friends.

Ps. If you are interested , let me know

A short note by Tolkien from 1949

eBay Item #231686967180

Does anyone have any concerns about this?