This rectangular canvas rucksack contains are large internal space for storing various assorted medical equipment. It has several inner pockets and ties to keep a M5 Aid bag secure

The M5 bag (the one here is a 1980's example) contained all the medical supplies a platoon would need. This example contains the M5 bag with assorted contents including the emergency surgical instrument set. The remainder is filled with bandages of various sizes. The long external pocket would have contained an emergency splint, and the two short ones were for other medical equpment that could be accessed easily. Usually the medic carried extra canteens attached to the sides of this pack.

List of Contents (I am still looking for some of these items):

SURGICAL SHEET WITH THE MEDICAL CADUCEUS
JACKSON SIZE 3 TRACHEOTOMY CANNULA
1 MINOR SURGERY FIELD INSTRUMENT
8 GAUZE PETROLATUM DRESSINGS
2 - 11 3/4 INCH SQUARE DYED FIRST AID FIELD DRESSINGS
1 FIELD EYE DRESSING KIT
2 ARMY TOURNIQUETS
1 BOX OF COTTON SWABS ON A WOODEN STICK
1 TIN OF REXALL SURGICAL POWDER
2 BOTTLES OF WATER PURIFICATION TABLETS
1 TIN OF SUNBURN PREVENTITIVE CREAM
4 TONGUE DEPRESSORS
1- 4 INCH COTTON ELASTIC BANDAGE
2- 3 INCH COTTON ELASTIC BANDAGES
1- 3 INCH X 10 YARDS CAMOUFLAGED GAUZE BANDAGE
3 TRIANGULAR BANDAGES
4 ROUND CONTAINERS OF 1 INCH X 6 YARDS GAUZE ROLLER
1- 24 X 72 INCH GAUZE COMPRESS
1 INDIVIDUAL FIRST AID FIELD DRESSING
1- 3 INCH X 6 YARDS CAMOUFLAGED GAUZE BANDAGE
3 BOXES OF FIELD BAND-AIDS
1 TIN OF REXALL QUIK-BANDS BAND-AIDS
2 BOXES OF 1 INCH X 6 YARDS GAUZE
1 BOX OF 3 INCH X 10 YARDS GAUZE ROLLER PLAIN
1 BOX OF 10 MERTHIOLATE SWABS
1 BOX OF 10 AMMONIA INHALANTS
1 TUBE OF TANNIC ACID JELLY BURN COMPOUND
1 FIELD DRESSING IN A BROWN WRAPPER
1 TUBE OF PETROLINE BACITRACIN OINTMENT
1 TUBE OF OPTHALMIC OINTMENT FOR EYE INFECTIONS
1 PACKAGE OF 4 - 2X2 CAMOUFLAGED COMPRESS AND BANDAGE