Stamping curiosity on b engine

What would LL mean on the id pad?A guy is asking me and i dont know.Suppose to be a '68 383 Thanks

One L would be low compresssion, see http://www.hamtramck-historical.com/images/TSBs/1968/D68-25-1%20page6.jpg

Could it be a double stamp?

That is an Lindsay Lohan motor. If you check the clearances you'll see that it is set up rather loose.

Wonder if it has the sexy little freckels like when she was 18 ish???Prolly double stamp ok and thanks!