Mystery Z28(?) Oil Pan

[Z10Mike]

I found an oil pan that I cannot positively identify.  It is identical to my '69 Z pan with the 2 spot welded corner tabs(no outside dimples) and middle baffle with 2 spot welds. Side rails for the windage tray are just like the '69 pan.  Ski jump is more pronounced than the '69 but has no middle bump at the front side of the sump kickup like the service pan.  Side die draw marks and dimples are like the '69 pan.  The front seal looks to be just shy of 2 1/2 inches which would be like the later service pans.  Will try to attach pics for reference. 
Any help is appreciated.   

[Z10Mike]

Could this be a production '70's 2nd gen Z28/LT1 pan or an early service pan?  It does have a date code(?) stamped on the bottom surface near the front seal area which is visible in the photos.  This one has me stumped.

[Stingr69]

Late L-82 Corvette pan is possible.  I will check the one I have in the garage later and report back if I can add anything.

That pan and its other very similar versions were produced by GM for decades.  Saw where Bob Harris claims to be having them made now.  They go for $260 new.

[Stingr69]

Looks like the one I have.  This is a '79 production line L-82 pan.  Good piece.

[Z10Mike]

From everything I have been able to gather from online, friends and this forum, this is indeed a 75-79 L82 production pan.  Thanks to all who responded.  Much appreciated.