Question about 300 series blades.

[DeSotoSky]

Can someone tell me when the change from flat ground to hollow ground main blade took place?
Specifically on a Cadet 303. I'm thinking it's early to mid 90's but would like to pin it down more closely.
Thanks in advance. /Roger

 

[300Bucks]

Someone else just asked that same question of me on a PM. So, you figure it out from picture, the top knife is 1990 X , then its every year as you go down. How does 94/95 look to you. 300

 

[DeSotoSky]

Thanks for the reply. That's about what I thought.