I don't have this machine, it's an ad that I saw and that really intrigued me. But the ad quickly disappeared. I only had one exchange with the seller who didn't confirm that the hulls were made of metal. In the photos I see screws that should allow it to be opened. I didn't follow up on this ad because the seller wanted it much too expensive (more than 3 times the usual price for a 237 in good condition) and didn't seem very reliable to me. Since then I've only seen one other one on a sales site in southern Italy. Out of curiosity I'd like to find another one, these models are apparently relatively rare, it seems interesting to me to know its history. I continue to look for information to perfect my knowledge of the 237.
I've contacted many people on the internet who seem to be enthusiasts but none of them have any information on this model. Hence my growing interest, this is becoming a very interesting investigation. What I know is that there are two versions of the 237 referenced. The first one does not have a wheel to lower the feed dogs and the second version with a wheel on the plate to lower the dogs and a large button to adjust the pressure of the feet. The model I am talking about would therefore be a third version. Made in Milan like the others but very little distributed. By its shapes it seems more recent. Did it have more plastic parts that made it more fragile and therefore there would be fewer left?
I continue to search by trying to get closer to Singer enthusiasts.
For information, on the back of the machine, where the motor is located, it is written:MODEL 237 M 93
210-230 VOLTS 75 WATTS
50-60 Hz AC
THE SINGER COMPANY
MADE IN ITALY