My Airfix Heinkel 111 had two 1000Kg bombs. I painted them black.
That'd be 2,200Lb (The 'Hermann' bomb). Which seems to fit with the maximum external bomb load a He 111 could theoretically carry.
Such a bomb was found during work on the Olympic sites in London in 2008.
The below links indicate that they were carried in '42 (at least if the writing on the picture is '42')
Minenbombe
Axis History Forum • View topic - Id. aerial bombs
Luftwaffe Resource Page Bomb Annex - SC 2500
www.warbirdsresourcegroup.org - Luftwaffe Resource Center - SB 1000
www.warbirdsresourcegroup.org - Luftwaffe Resource Center - SB 1000 Parachute Bomb
File:SB 1000.jpg - Wikimedia Commons
There were German bombs of 2500Kg (SC2500) which is over 5000Lb so there seems to be a little confusion.