Item up for sale is a new generation custom manufactured  tempered mineral replacement glass crystal with DIAMA coating + optional Blue AR coating made for Seiko vintage 150M 6306,  6309 & 7548 diver watches only as following:

150M 6306 & 6309 Family  
6306-7000, 6306-7001, 6309-7040, 6309-7049, 6309-7290, 6309-729A & 6309-729B

150M  7548 Quartz Family  
7548-7000, 7548-7001, 7548-7009, 7548-700A, 7548-700B, 7548-700C, 7548-700F & 7548-700H

This great quality replacement crystal is made out of high clarity optical grade tempered glass not those lower industrial grade greenish glass you often see.  The crystal glass was manufactured with 1:1 ratio according to original outline specs of 320W34GA00 with frosted bevel plus clear DIAMA hard coating makes the crystal surface much  harder that is more resistant to scratching.  We also offer blue AR coating (at inner side of the crystal) as an optional.  If you are a confirmed Seikohalic or going to join the club, this is a must have item for your vintage Seiko diver watch collection.

Please visit my eBay store for more quality watch items.