Hello,
Nice to see this old German pattern welding.
Spiral, I believe Fernando explained in one of his first posts that he is using a translator to communicate. The Spanish is translated below in English and he is including the original Spanish in case the translation is faulty and to preserve his meaning
Now this patterning was done purely for aesthetic purposes, was it not? By the 1870s Germany was producing large quantities of cast steel if I recall correctly.
Cheers,
Emanuel