Box of 15 rounds produced by the Germans during the Third Reich.  They are 7.92mm x 57mm, armor piercing, tracer made in 1937.  This ammo is the type that was used by both ground forces and the Luftwaffe.

The label gives information about all the components of the rounds.  Powder, casing, bullet components, tracer material and primer.  Polte (P) is the manufacturer who assembled all the components into a complete cartridge.

Boxes are clean but the cartridges are tarnished from age so price is $15 per box. 

Patr. stands for patronen which means cartridges.
 
S.m.K. means armor piercing.    

L'spur (Leuchtspur) means tracer.

gelb means the tracer color is yellow.

The second line shows that the cartridge components were assembled by Polte.  It was their 10th delivery lot of 1937.

Nz. Gew. Bl. P. means nitro cellulose rifle flaked powder.  (2, 2, 0.45) means the powder particles are 2mm by 2mm by .45 mm.  The powder was made by Westfaelische-Anhaltische Sprengstoff AG, Werk Reinsdorf (Rdf.), delivery lot 28 of 1937.

Patrh. means cartridge case.  It was made by Polte (P), delivery lot 31 of 1937.  The S* means the composition of the brass was 72% copper.

Gesch. means bullet, made by  Theodor Bergmann & Co. K.G., Werk Velten (P.398), delivery lot 100 of 1937.

Satz means the yellow tracer composition and was also made by Theodor Bergmann & Co. (P.398)., delivery lot 100 of 1937.

Zdh. means primer (Zundhutchen), 30 means the primer cup is made from copper-plated brass, delivery lot 113 of 1937.  Maker is Rheinisch-Westfälische Sprengstoff A.G. Werk Stadeln bei Nürnberg (R.W.S.) .  I'm not sure what the "b" is after the lot number.  It could be a lot sub set.

The maker of the armor piercing core (Geschossteile) is not identified..

 

The rounds are dulled being more than 70 years old.

The black tip of the bullet indicates a tracer round.

P means the cartridge case was made by Polte.

37 means it was made in 1937.

The S* means the brass used for the cartridge  case is 72 % copper.

"31" means delivery lot 31 from Polte in 1937.

The red primer sealant means an armor piercing round.

Box maker is possibly HLJ, made in 1937.