Model F
1954 BAL-AMi Model F
Generally sold by Balfour with an AMi badge but the one pictured clearly has a BAL-AMi logo - maybe this was the earliest use of the BAL-AMi name.
These are very rare - I've only been notified of one in existence since starting this web site in 1997.
Similar to the Model E, it's likely that only the 45rpm F80 variant was built by Balfour, and not the 78rpm F40 or the F120.