Seeking avocado Id's

[pineislander]

I have several avocado trees which are unmarked and I would like to get them identified especially in respect to their ripening season.
They were planted on property formerly owned by Treehouse nursery owned by Bob and Vivian Murray but probably after their deaths by their daughter.
The first pictures are of two trees which are quite different from all the rest, much smaller in size both tree, leaf, and fruit.
Of all the avocados I have these two would be considered 'dwarf' type trees.
The fruit are small and do turn black. Could this be Wurtz?

[pineislander]

The second tree is average in size but the fruit is distinctive in the way the stem attaches to the fruit. The stems come out of the fruit offset from center and thus the fruit hangs at an angle to the stem.

[pineislander]

The third tree is average in size and all the fruit are close to spherical in shape. Could this be Choquette?

[pineislander]

The last tree is average to large in size, fruit does turn black.

[bsbullie]

Wurtz does not turn black.

The last picture/tree, is the skin smooth and shiny?

[spaugh]

The little black ones look like mostly mexican type.  Like mexicola or stewart but could be any kind of mexican avocado.

[pineislander]

Wurtz does not turn black.

The last picture/tree, is the skin smooth and shiny?

Now that I look at Carlos' description of Mexicola I can say that is likely the first tree.

On the last tree, the skin is slightly bumpy and shiny. I will be picking some today to see seed shape/size.
Any hints what variety to look for?

[bsbullie]

Wurtz does not turn black.

The last picture/tree, is the skin smooth and shiny?

Now that I look at Carlos' description of Mexicola I can say that is likely the first tree.

On the last tree, the skin is slightly bumpy and shiny. I will be picking some today to see seed shape/size.
Any hints what variety to look for?

Last tree appears to be Brogdon.