This very rarely seen Le Forban Securite-Mer 20 ATM diver has a glossy black dial that is in lovely but not perfect condition, showing light wear.  The lume on the dial has aged to a golden butterscotch while the lume on the hands has aged to a slightly lighter warm buttermilk hue.  In person this contrast is very subtle and complementary.  The lume emits a quick-burst glow after being exposed to bright light.  In my humble opinion the lume on the dial at 12 o'clock was likely originally applied the way you see it, slightly hollowed out.  I've owned several other Le Forban's over the years, a few of which were NOS, one owner, never serviced examples, all having some degree of quality control issues.  The bezel, which ratchets counterclockwise perfectly, has its original vibrant red and navy blue insert that presents beautifully.  The massive Monnin stainless steel case is in wonderful condition having likely been polished at some point in its life.  It shows showing very light wear, is free of any significant dents or dings and shows no signs of oxidation.  The outer edge of the case back is stamped "ETANCHE   20  ATMOS   AUTOMATIC" with "20094" stamped in the center.  The inside of the case back is stamped "BREVET +" followed by "503.305" and "M.R.P. S.A.."  Although the crystal is in excellent condition there is some haze on its underbelly.

The automatic movement with quickset date function, which I believe to be an FE 4611, keeps accurate time and the date rolls over at approximately 12 am as it should.  The quickset date function works flawlessly by pulling the crown out to the first position and then turning it counterclockwise until the desired date has been reached.  After recently winding the screwdown crown 39 full revolutions the movement had an impressive power reserve of approximately 42 hours.  The crown winds smoothly.  Please note that while the crown can be unscrewed and screwed back in, I've noticed that occasionally the crown needs to be pulled out to the first position and then be pushed back in to wind the crown in order to generate a power reserve.  With some patience and gentleness I haven't found this to be much of an issue but it can be easily addressed by a skilled watchmaker.  Given that this watch is approximately 45 years old, the issue with the crown and considering its unknown service history (there is only one visible watchmaker service marking on the inside of the case back that appears to date back to 2005), it is overdue for a complete overhaul to keep it running strong and as it should.  

This watch measures approximately 41 mm excluding the crown, approximately 45.5 mm including the crown and approximately 20 mm between the lugs.  Case thickness, measured from the bottom of the case back to the top of the bezel, is approximately 11 mm.  Including the crystal case thickness measures approximately 12 mm.   

Although this watch runs strong and keeps near perfect time, given that it has only been serviced once, more than 12 years ago, and considering the issue with the crown, there are no warranties, express or implied, attached with the sale of this watch.  Vintage means old and while my personal belief is that old-school means better quality and workmanship, things can and do go wrong from time to time.  A full overhaul is recommended.  Any servicing costs going forward are your responsibility.

Please thoroughly read this entire listing and kindly ask any and all questions you may have prior to buying as this sale is final and no refunds of any kind will be given.  And please study the 12 high magnification pictures carefully as they are part of the description and serve as an accurate representation of the condition of this watch.

Expedited and insured shipping along with signature confirmation will be provided.  Thanks for looking!