>>213153592 (OP)69 in Indian numerals is ६९, which doesn't match up visually with the 69 position.
This is an Indian temple with a small figurine at its wall depicting the 69 sex position. It is dated to 5th century.
The Kama Sutra (dated to 2nd century) describes 69 as follows:
The way of doing this (i.e. of kissing the yoni) should be known from kissing the mouth. When a man and woman lie down in an inverted order, i.e. with the head of the one towards the feet of the other and carry on this congress, it is called the "congress of a crow".'
The word is "Kaksamyog" (Kak=Crow, Samyog=Congress).