Gulbransen Rialto K model 1135
The Gulbransen Rialto K is a combo organ that was popular in the 1960s and 1970s. It is a dual-manual organ with a built-in Leslie speaker. It is a versatile organ that can be used for a variety of musical styles, from jazz to rock to country.
The Gulbransen Rialto K model 1135 is a relatively rare organ, and as such, it can be difficult to find one for sale. However, when they do come up for sale, they typically sell for between $1,000 and $2,000. The price of an individual organ will vary depending on its condition and the features that it has. Since yours is fully modified with 2 Leslie speakers, you may be able to sell it for more than this price.