There are differences of the front fork detail from 1959 to 1961. The 1959's have the long hand painted full length fork pin striping. The 1960 models had this feature yet. The 1961 models have the short fork "dart" pinstripe design which was new for that year. Also, the 1959's have the large metal headtube badges with color coordinated letters on them. Starting in mid 1960, they went to the now famous plastic "starburst" badges which I believe were used on their deluxe middleweight models to (I think) early 1964, when they reverted back to a small metal badge.