A complex composed of two gamma-tubulin molecules and conserved non-tubulin proteins located in the mitotic spindle pole body and isolated by fractionation from cells. The complex, approximately 6S-9S, is analogous to the small complex in animal cells but contains fewer subunits, and is not thought to multimerize into larger functional units, like complexes in those organisms. An example of this structure is found in Saccharomyces cerevisiae.