The_Jalantikus

Hi there - I just found an Angelica in our loft. Wondering if anyone has any idea how old it is? All it says on the inside is Angelica, Model No. 2857, Supplied by Boosey and Hawkes, London. The machine heads look like they could do with replacing - does anyone know whether machine heads come in various sizes for this type of guitar? I am an amateur so looking for advise!