This title shall not be construed as amending or repealing any other law of the state authorizing the incorporation of banks or regulating the same, but shall be deemed to be additional legislation for the sole purpose of authorizing the incorporation and operation of mutual savings banks and mutual savings banks converted under chapter
32.32 RCW to stock form, as herein prescribed. Savings banks incorporated on the stock plan, other than converted mutual savings banks, and other stock banks having savings departments as authorized by *RCW
30.20.060, or by any other law of the state heretofore or hereafter enacted, shall not be in any manner affected by the provisions of this title, or any amendment thereto.