Engraving
The ref 6204 has some really nice engravings. At the inner side of the caseback there you can find the crown and the print "GENEVA SWISS PATENTED 6204" and between the horns is "BREVET +" in big letters. “BREVET” is the French word for “patent”. The plus sign (+) stands for Switzerland, or more precisely for the Swiss Patent Office, which used to use this marking. “BREVET +” therefore means “Swiss patent applied for / registered”.
I used the 9V etching method. Therefore, I printed the design on a fluid film with a laser printer and transferred the toner to the case(back). With a 9 V battery and salt water, I etched the design at the metal. After 2–5 minutes it looks great, and I just use some sandpaper to get a nice finish. If you are more interested in the etching method, read this thread
The ref 6204 has some really nice engravings. At the inner side of the caseback there you can find the crown and the print "GENEVA SWISS PATENTED 6204" and between the horns is "BREVET +" in big letters. “BREVET” is the French word for “patent”. The plus sign (+) stands for Switzerland, or more precisely for the Swiss Patent Office, which used to use this marking. “BREVET +” therefore means “Swiss patent applied for / registered”.
I used the 9V etching method. Therefore, I printed the design on a fluid film with a laser printer and transferred the toner to the case(back). With a 9 V battery and salt water, I etched the design at the metal. After 2–5 minutes it looks great, and I just use some sandpaper to get a nice finish. If you are more interested in the etching method, read this thread
