Insurance; financial affairs; monetary affairs; real estate affairs; This class includes mainly services rendered in financial and monetary affairs and services rendered in relation to insurance contracts of all kinds; Includes, in particular-- services relating to financial or monetary affairs comprise the following-- a; services of all the banking establishments, or institutions connected with them such as exchange brokers or clearing services; b; services of credit institutions other than banks such as cooperative credit associations, individual financial companies, lenders, etc; c; services of "investment trusts," of holding companies; d; services of brokers dealing in shares and property; e; services connected with monetary affairs vouched for by trustees; f; services rendered in connection with the issue of travelers' checks and letters of credit; g; services of realty administrators of buildings, i;e;, services of letting or valuation, or financing; h; services dealing with insurance such as services rendered by agents or brokers engaged in insurance, services rendered to insured, and insurance underwriting services