The Speedmaster reference 2998 was the successor of the original Speedmaster: the reference 2915. (Please see Lot 9 in this sale). From the second generation of Speedmasters, this reference began its production in 1959 where eight case references (-1, -2, -3, -4, -5, -6, -61, and -62) were successively introduced during only four years.
The present watch features an attractive dial with Alpha hands and nicely aged luminous material as well as period bracelet and desirable No. 6 endlinks.
An example of the reference 2998 is illustrated and described in OMEGA, A Journey Through Time by Marco Richon, 2007, p. 596