Around 1935, National and Dobro merged. It was about this same time that Dobro introduced its line of metal body guitars. They featured a roll-formed, fiddle-type, lip that was used to attach the top and back of the body to the sides. Dobro’s metal body guitars used the standard inverted cone with the spider bridge (most also have an extra shelf in the conewell for a standard National cone). I really like these guitars. The spider cone makes them sound different from Nationals. But since they were basically designed by the same people who made Nationals, they feel a lot the same to me. They look cool too, especially in the frosted duco finish (which was typically gold). Here are some Dobros I’ve restored, mostly M32 models with the occasional M35 and Alumalite.