Brockage Pair
Collectors of Brockages know that:
It is these matched sets of two coins that are the subject of this page.
Here, for example, is a Brockage Pair of English "Bullhead" shillings -

(the Obverse Brockage)

(the Reverse Brockage)
And here is a Brockage Pair of French gold 20 Franc pieces -

(the Obverse Brockage)

(the Reverse Brockage)
Notes:
Here is the reasoning that says that most Brockages of a coin type found in collector circles will be nearly all Obverse or nearly all Reverse Brockages - - - Since Brockages are usually produced when the upper Coining Die is covered by a previously struck coin, Brockages may be expected to show two images of the lower Die. In the case of World coins, the upper Die usually carries the picture of the coin reverse, so most foreign Brockages are Obverse ones. (One has to wonder how a Reverse Brockage world coin is ever produced! Might someone at the Mint have mixed up the Dies)?