The answer is: steel! 24 Mani Neram Tamil Movie Mp3 Songs Free Download. But they have truss rods like an acoustic. Am I supposed to have steel strings or nylon strings on this guitar? On some of the older models: the #6,7,9,12, and 18, the answer is not immediately obvious, since all these models have slotted headstocks like a classical, and the saddle in the bridge is like a classical.not angled (compensated) like an acoustic steel-string. Many people have posed this question to me about their older Nagoya Suzuki. One or two numbers in the serial number stands for the. History and pictures of Nagoya Suzuki and Kiso Suzuki guitars and. Nagoya Suzuki had a ' Three S ' brand of guitar that seems to be consistently very highly valued by everyone that owns one. Nagoya Suzuki made violins and mandolins, and is still in business making violins, but no guitars.