Many variations of marks used in both periods.

One distinct difference is the use of the crown on the top of the shield. Presence of the crown indicates date of manufacture 1948 or before. That is true with marks with or without the text around the shield.

On the two examples below clearly seen the crown on the left and the stylistic letter H with letter P in the center .

The type of marks shown here usually represent "First Class Quality".

The date code used commonly only from the 1990's.It is on allmost all new items.

The letter "H" represent the month and number "93" stands for the year of 1993. Code for fhe month start with "A" as January and runs in order of the alphabet . "H" stands for August.

From 1939 to 1948 many marks had the year incorporated in the mark itself. (see 1943 in mark on the left.)

On newer items maybe a country code under the form number, and a painter number away from the mark

As a general rule a "HEREND" impression is present on the bottom of the item and a form number impressed also, even if in many cases hard to detect.