If it means anything or helps the April MO shortblock I'm using has a round / grey tip stick, I can't back it as original to that block as I don't have complete history On it.
Thanks Chris and Steve as your info was added!
At this years (2017) MCACN there was a 68 Z/28 05C 21K mile survivor with the flat handle with gray tip. This is the 6th survivor I've noted with that type dipstick.
Start 1968 Z/28 Dipsticks:
11C NOR Round handle w/gray tip
11C Flat handle w/gray tip
12D NOR Round handle w/gray tip
12D NOR Flat handle w/gray tip
01B NOR M stamp Round handle w/gray tip
02C LOS M stamp Round handle w/gray tip
April built MO per Chris round handle w/gray tip
Six of the Seven below are Survivors & have the flat handle with gray tip.
04D 68 Was at MCACN 2015 in barn finds
05C 68 at 2017 MCACN survivor judged with 21K original miles
05E 68 Danny’s E stamp
06A 68 Dave’s E stamp
06B 68 rare396bronze E stamp NOR
07C 68 Jerry’s E stamp
07D 68 Skip’s E stamp
07E Per Steve, Tonawanda 0702EE L-30 has the flat Gray tip E stamp as well.