The seller probably thinks it has something to do with Lac Leman. A quick Google shows a Cycles Leman in Northern France, as a betting man that's where my money would go, the (probable) 'CYC' on the decal being an abbreviation of cycles.
No I wouldn't, it looks to me to be a good quality frame still with all its original components, you will end up ruining a perfectly good road bike. Service it and ride it as a geared bike.
The seller probably thinks it has something to do with Lac Leman. A quick Google shows a Cycles Leman in Northern France, as a betting man that's where my money would go, the (probable) 'CYC' on the decal being an abbreviation of cycles.
#gaston might know more.