The player can find the other buttons in relation to these indented or pointed buttons. Generally it is cellulose over a wood or metal frame, but can sometimes be made of other material. Yes, accordions can be made in any colour. Weights and sizes differ due to the many different preferences, needs and sizes of the player and the type of music they wish to play. Generally speaking, the lighter the overall weight, the better quality of accordion and the internal parts that have been used.
Switches can be on both the bass and treble side of the accordion in varying numbers.
They shut off or open different banks of reeds to change the octaves and sounds of the accordion. The free reed is a band of metal attached at one end to a metal plate and free to vibrate at the other. Air from the bellows is necessary to activate the free-reed in an accordion. Different quality raw materials determine reed quality. There are many different shapes and systems of keyboards in accordions.