15 x 10-inch green and white specimen of a $5,000 Open Space Park Bond of 1978, Series 79A. 'The City of San Diego, for the San Diego Open Space Park Facilities District No. 1, hereby acknowledges the District to be indebted and, for value received, promises to pay to the bearer, or if this Bond be registered, to the registered owner hereof, on the first day of January 2009 $5000 together with interest hereon at the rate of 6.40 percent'.