A rectangular pack worn on the back with the Small Pack (haversack) carried on the left hip. The large pack would have contained the Great Coat, spare shirt, pair of socks and a pair of draws cellular. 

Pack-1 

• Large Pack
• Two L-Starps
• Two Utility Straps 

Pack-2

• Large Pack
• One L-Strap
• Two Utility Straps

Unfortunately one of the L-Straps in missing from pack-2