I'm not at all close to an expert but it seems to help the experts on here identify a cultivar when you also have pictures of a leaf/the leaves to show the pattern they have.

Is this possibly a wild tree?

There's at least one documented wild tree south of Fairfax...

http://www.calflora.org/entry/observ.html#srch=t&lpcli=t&taxon=Ficus+carica&cch=t&inat=r&cc=MRN

I've added a photo of the leaves to the original post, as suggested. 

This is not a wild tree. It's in someone's front yard. 

A few to research. O'Rourke and LSU improved celeste

While this post has logged some 94 views only one person offered a suggestion (thank you, @brianm). I'm still struggling to make an identification and would appreciate any help. 

What seems more likely: O'Rourke, LSU improved celeste, Celeste, LSU Tiger or Unk. Calderwood?

This tree was deliberately planted from a cutting from another tree, also in the same county. The family were originally Italian immigrants, which is common in this part of Marin County. The tree is healthy and seems to be remaining medium sized, with a 15' by 15' profile. Would any additional information be helpful to those considering a reply? 

Man...those leaves look identical to mine, also most likely brought from Italy by immigrants.  I cannot seem to get a read on what I have either...it was given to me by a friend. 

 

Jim,

Breba or Main crop in the photos?

Happy Growing,   kiwibob, Seattle

Hi Kiwibob, 
That's the breba crop in the photo. 
Jim

Jim,

Try pages 428 & 531 of Ira Condit's "Fig Varieties: A Monograph" (downloadable as a PDF from several sites including my website).  Your description of "When fully ripe, the skins become somewhat leathery and the inside is a much deeper violet color" makes the variety you will find on those pages my guess!

Happy Growing,   kiwibob, Seattle

Hi Kiwibob, 

Are you suggesting Brown Turkey? I'm disinclined to believe it's that fig. Brown Turkey are very common in this area (in fact we have one in our yard) and the fig in question is pretty different. I admit the leaf shapes are similar. What do you think about the possibility of LSU Improved Celeste? 

Jim

Would someone mind posting a picture comparing a Celeste and a Brown Turkey leaf pattern?

I'm not having much luck finding a comparison picture.