The death registration for William F. Buckle in 1926 indicate he was 53 so a birth in 1873.
From FreeBMD
Births Dec 1873
Buckle William Francis London C. 1c 44
1881 census RG11 378 folio 93
1 Kennet Wharf St Martin Ventry London
William Buckle 34 Brighton, Sussex, Head Married Warehouse Porter
Kezia Buckle 33 Deptford, Kent, Wife Married
William Buckle 7 London City, London, Middlesex, Son
Mary A. Buckle 5London City, London, Middlesex, Daughter
George Buckle 4 London City, London, Middlesex, Son
Arthur Buckle 2 London City, London, Middlesex, Son
Ada J. Buckle 2 days London City, London, Middlesex, Daughter
Marriages Dec 1872
BUCKLE William Wandsworth 1d 887
HUTCHINGS Kezia Wandsworth 1d 887
1891 census RG11 239 folio 161
1 Kennet Wharf Lane St James Garlickhithe London
William W Buckle 42 Brighton, Sussex, Head Married Grocer's Warehouseman
Kezia Buckle 42 NK Wife Married
William F Buckle 17 London City Son Apprentice ? Stationers
Mary A Buckle 15 London City Daughter Mantle Making
George Buckle 14 London City Son
Arthur Buckle 12 London City Son
Ada J Buckle 10 London City Daughter
Kezia Buckle 6 London City Daughter
Bertie Buckle 4 London City Son
Winifred L Buckle 1 London City Daughter
1901 census RG13 265 folio
56 Ludgate Hill St Martin Ludgate London
William W Buckle 53 Sussex, Head Married Housekeeper
Kezia Buckle 53 Kent, Wife Married
Mary Ann Buckle 25 City E C Daughter Servant
Ada Buckle 19 City E C Daughter Dressmaker
Kezia Buckle 15 City E C Daughter
Winifred Buckle 13 City E C Daughter
Marriages Sep 1898
Buckle William Francis London City 1c 39
Holman Laura Annie London City 1c 39
1901 census RG13 501 folio 91
20 Worlingham Road Camberwell London
William Francis Buckle 27 Queenhithe, London, Head Married Solictor's Clerk
Laura Annie Buckle 32 Camberwell, London, Wife Married
Minnie Laura Buckle 7 mths Camberwell, London, Daughter
Regards
Valda