The Lake scheme.

Not known specifically if this scheme was used by Mason, or used on Mason
Bogies.  This colour scheme represents the style adopted by many of the top
builders during the late 1870s.  It is possible Mason also used this
scheme. Today you can see the Baldwin 4-4-0 'Eureka', Sonoma and Empire
restored to 'as built' condition using this type of 'lake' colour scheme.
Refer the Jim Wilke pages for decoration details.
-Fletch