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  • Tricky, which Roberts frame numbering can be: post 1979 they - apparently - changed to a six digit numbering system but deviated from that when building frames for the trade ! Five digits would suggest pre 1979...I think it is early and a Penge frame but sticking my neck out. My two early frames have three digit numbers and are Sydenham frames.

  • Based on what's been said in the Roberts thread previously, I'd interpreted it as year/month/frame number (of that month). Does that sound right to you?

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