The subject of Singer's SV machines came up (again) in a couple of recent posts, so I thought I'd put in what little I know under it's own topic. If anyone knows anything about them (preferably fact, not speculation) please feel free to add to the meagre knowledge available. I found this at the ISMACS site - " This list, published in 1926, reflects the sheer variety of available machines and the myriad purposes for which they were intended – from aeroplane hangars and balloons to vests and