Just a query about the Seiko Bell-matic 4006-6011.
does anyone know whether the 4006 of Bellmatics has a variation regarding the tap size of the stem. I am curious as I now have two crowns neither of which is tap size 9 and both of the crowns were supposed to be a fit. I was advised that the first crown had been supplied incorrectly and was refunded. However, I got a second crown reportedly to fit the 4006 series and it proved to be the wrong tap size as well. I have the original stem and a NOS stem both of which are tap 9 so I am going to either grind down a tap or obtain an M1 .25 bottoming tap to re -tap the crowns to sort the matter but I am curious to know if any members have any info on this.
Cheers,
Vic