A Losing Streak attributes to a "losing streak". Grandad shows Del a double-headed coin that he got off a Scottish man during the war, and advises Del to use it against Boycie. Grandad clearly remembers the story behind the coin as if it were only yesterday. According to him, the man said: "I want you to have something to remember me by, Trotter. Take me lucky coin." Then, he went (as in the Scottish man deserted, not died as Del thought). Later, at "The Nag's Head", the Trotter Brothers and Trigger talk about Del's bad luck until Boycie walks in. Del challenges him
Rodney Trotter along a couple of years later after me. Oh no no, not you. You had to wait thirteen years!" In the following episode "Go West Young Man, which was broadcast in September 1981 (and was the second episode of "Only Fools and Horses" ever broadcast), Del Boy states that he (Del) is 35. In "Big Brother" since Rodney had said he was 23, Rodney must already have had his birthday that year with Del still to have his 36th birthday later that year. Therefore Rodney must have been born during 1958. In "As One Door Closes", set in early 1985,