Okla. Stat. tit. 62, § 62-543: Marking and record of securities purchased - Account of

treasurer.

Each and every item of securities purchased as an investment

under the first and foregoing section hereof shall be marked or

stamped with a number, and so recorded as in form prescribed, which

record shall not fail to disclose unmatured coupons attached to any

negotiable coupon bond purchased; and the account of such treasurer

with each such sinking fund shall distinguish between the cash and

investments belonging thereto. Such record shall, as to any sale,

make reference to the district court case authorizing the same and

the effect of such order. Moreover, at the time investment is made,

each and every item of such securities payable to bearer shall be

marked or stamped: "This (item) is the property of the Sinking Fund

of (naming the municipality) as an investment therein, and no

assignment therein, and no assignment thereof shall have any force

and effect unless it makes reference to the order of the district

court authorizing the same.