Spark plug timing marks

OK you engine Guru's
Does anyone have a clear image they can post of what the timing mark is suppose to look like on the plug?
I have tried to read mine and came up empty handed, may not have enough run time on the plugs?
Well after all this good info I went back out and looked at the plugs again.
It appears that the timing mark is 3/4 up from the threads before the bend. Never did see an initial timing mark on the flat part of the ground strap.
Timing is currently set at 16* initial, 36* all in at 3200
I am running a vacuum advance that kicks up the total timing to 44* all in.
Healthy ported iron head 340, engine runs well at these settings.
I think I will leave it where it's at and check it again after a couple hundred more miles.
Thanks for all the help