First line of Scotty Cameron by Titleist putters released (now referred to as Classics). All models took their names from locations in California: Newport, Catalina, Coronado, Del Mar, La Costa, Laguna,and Napa. Santa Fe and Sonoma models are added in 1996.
Similar to the Catalina, the Sonoma has a few distinct changes that make it appeal to a completely different putting stroke. A single bend shaft gives it a more flowing look, and doubling the offset clears the shaft out of the way for a better view of the ball at address. The sightline on the Sonoma is thinner than the Catalina and affords the same clean look at address.
I've been looking for a good condition Sonoma for a while to give one a try long term. I'd be willing to give you £50 for it providing it was in good condition and you don't fancy it or get on with it well in person.