It'c compact geo (meaning the top tube is not horizontal), so 54 should do you fine as it has an effective seat tube of 56cm which should be bang on. But best to go and ride it if possible.
Edit: Also the addition of braze ons would sell it for me.
@chiroshi started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
It'c compact geo (meaning the top tube is not horizontal), so 54 should do you fine as it has an effective seat tube of 56cm which should be bang on. But best to go and ride it if possible.
Edit: Also the addition of braze ons would sell it for me.