Are pennies magnetic

2 Pfennig 1967 G // 1969 J

Points reactions

Unfortunately I have to disappoint you:
Your coins are worth 2 pfennigs each = a total of 2 cents.

Unfortunately you don't have the rare pieces.
With them it’s with the Magnetizability the other way around.

Until 1968 the 2 pfennig coins were made of bronze.
As this became too expensive, copper-clad steel was used from 1968 (as with the 1 Pfennig pieces since 1948). 1968 was a year of transition in which 2 mints were made (Munich (D) and Karlsruhe (G)) both bronze and copper-clad steel coins produced, the other two just the newer type.

However, a few specimens were made from copper-clad steel from 1967G 1. (before the material changeover). However, only for the PP sets (According to Coins & Collecting). These pieces are attracted by magnets.

From 1969J are 2. erroneously a few copies have been made of bronze, although copper-plated steel should actually be used. These pieces are NOT attracted by magnets.

According to the catalog, only 520 and 550 pieces of both pieces (the ones that were made by mistake, I mean) were issued.

Your coins were minted in the millions and are therefore unfortunately not particularly valuable.

1967 G, however, is a relatively weak year of issue with "only" 6.28 million pieces. In good condition you can hope for more than face value.

Best wishes

that is, nothing to add except for two small corrections.

1. (in front the material change).
These pieces of Cu-plated Fe, which only appear in the PP sets, were not created before, as mentioned, but clearly after the material changeover! In the "then" time, these PP-phrases were still minted according to the need for the respective year.
Later, when no more bronze blanks were available, further inquiries about these sets from 1967 G, among others, arose. So it turned out there deliberately manufactured, these material variants.

Note: A few more of these sets with the 2-PF peculiarity were created later without an official minting order (Karlsruhe coin scandal from 1971)

2. erroneously
According to the relevant information, these Hamburg pieces were not made by mistake, rather they are the late ones, but conscious consumption a small remaining amount of bronze probes still present (still surfaced) in the mint. This is also a material variant in this case.

A few pieces were actually made by mistake in the minting year 1967 (3 real specimens are known so far), which were minted on the "new" circular blanks showing a magnetic reaction.
These blanks mix-ups belong by definition to the collecting area of ​​incorrect coining (coincidence of coining).