John - Like all factories, Bear was in business to make money so did things like paint glass, and use odd lots of wood for some bows or parts of bows.
As collectors we have a need to put everything in its own little category, but the truth of the matter is a lot of exceptions were made from the norm. Some on purpose and some by rouge employees to make something different to sneek out the back door and others as just plain goof ups.
If Bear had left over coins of one type and the type of coined changed the next year, they did not throw the old coins away, they were all used. Same with wood and glass. They found a way to use it.
Anyone who had worked around a factory will tell you that when the boss is not looking over their shoulder, some employees do a lot of things that are not sanctioned by the company.