We saw recently a brass sculpture of the historical buddha with a similar v-shaped hairline and prominent knop, seated on a double-lotus base with apple-like petals. This one has a row of exceptionally large beading at the bottom. His right hand is just above the upper rim, in his traditional gesture to call Earth to witness (his enlightenment).
More often, the middle finger touches the base. In this case, the forefinger is slightly forward. The buddha’s punched navel and the waist of his lower garment are visible through his partially folded robe, the border of the cloth is decorated with a chased pattern.
Here the little finger and forefinger of his right hand are slightly extended forward.
Conventionally, when the right hand calls Earth to witness, the left hand is held in the meditation gesture.
16th century, Tibet, Shakyamuni, bronze (copper alloy), private collection, photo by Polyauction.
This buddha presses three fingers of his right hand onto the base.
16th-17th century, Tibet, Shakyamuni, gilt bronze (copper alloy), private collection, photo by Michaans https://www.michaans.com.
And on this example the hand is above the base, no finger entering in contact with it.
It is very rarely held at a slant.
This one has four fingers going over the edge of the lotus base.