You don't say what model this machine is.  However, none of the Singers made immediately after WWII have much if any value as collectibles.  It is still worth something as a sewing machine if it is in good working condition.  The value depends on how well maintained it is.

Impossible to say for sure without seeing it.... But unfortunately probably not very much. Almost all the Singers made in the 1930s were stamped out in terrific numbers. If the machine is in perfect working condition and excellent cosmetic condition (not just 'really good for its age') and you're located in the right place and … Read more

A 222k is worth significantly more than a 221k. It depends on where you are located and what condition the machine is in. In the UK they seem to for less, but in the US the regularly sell on ebay for anywhere from $800 to $1200 for models with North American (110V) motors in complete … Read more

It depends entirely on the condition and your location. Although the 15-80 was not one of the common submodels of the 15 class, they're still too common to really be worth anything much as collectables. Here in the US, if the machine is in perfect working order, fully serviced and still has very good or … Read more

Singer has been making Sewing machines for over 150 years. There have been over 1000 models. Care to mention which Singer bobbin you'd like to thread? Almost every machine is different.

The model 99 was manufactured for approximately 40 years and had numerous versions and subversions. In the early days of portable electric machines, the knee-bar and foot pedal were both popular but over time the knee levers were phased out. At a guess, your model is most likely a 99-13. For the first 20 years … Read more

According to the serial number lists it's a 1951 Singer Featherweight 221K made in Scotland. Does that match? If so, it depends on condition. An absolutely pristine machine (and I don't mean 'good shape for its age'--- I mean it literally looks like it just came home from the store, absolutely zero nicks or scratches, … Read more