Services relating to financial or monetary affairs, namely banking establishment services or institutions connected with them, exchange brokers or clearing services; services of credit institutions other than banks, namely co-operative credit associations, individual financial companies and lenders; services of investment trusts and holding companies; services of brokers dealing in shares and property; services connected with monetary affairs vouched for by trustees; services rendered in connection with the issue of travellers' cheques and letters of credit; hire or lease-purchase financing; services of realty administrators of buildings, i.e., services of letting or valuation, or financing; insurance services; services rendered by agents or brokers engaged in insurance, services rendered to insured, and insurance underwriting services.;