Test oil - 9704 MOEBIUS

There are six test oils. This oil kit is used to check the quality of the epilame (Fixodrop) deposited on a given surface. Test Oil no. 4: With no epilame on the surface, this oil spreads easily just like a standard watchmaking oil with moderate adherence. If oil no. 4 forms a droplet and does not spread over the surface, this confirms that the epilame is of high quality.