1951 Longines classic Sei Tacche Watch with Mixed Arrow and Arabic Numerals Model 5697 casesize_33mm The double-hinged back provides a

The double-hinged back provides a reassuringly substantial feel

Starting in the mid eighteenth century

and I don't doubt you will see another one appear on my wrist soon and I wouldn't be surprised if it was this reference

Notice too

as Indian and Colonial Exhibition (London

1951 Longines classic Sei Tacche Watch with Mixed Arrow and Arabic Numerals Model 5697 casesize_33mm The double-hinged back provides aThis Watch We have here a stunningly aged longines Sei Tacche Reference 5697 (6 case back notches) The dial has the most unusual and in our opinion fantastic patina, almost like a baked caramel ,pumpkin soup effect or indeed Crme brle This gives no doubt to its originality. This patina is usually caused by a hot humid environment but we have also seen this effect happen to vintage window stock where the shop front window acts as a magnifying glass