Hi all! I'm working on a vintage build and am new to some of the compatibility issues for threaded headsets. I would like to buy a new Velo Orange headset and want to make sure I'm getting one that is compatible with the frame and fork. I believe the frame/fork is 1" JIS. Here are the specs I took for the fork and headtube:

Fork Crown diameter (where the crown race sits on the fork): 27.0mm
Head Tube inside top diameter: Approximately 29.9mm
Head Tub inside bottom diameter: Approximately 29.9.mm
TPI: 24

Here are the specs for the Velo Orange threaded 1" Alloy Caged Bearing Headset (JIS)

• Fork type: 1" English threaded
• Stack height: 41mm
• S.H.I.S. Upper: EC30 / 25.4-24tpi
• S.H.I.S. Lower: EC30 / 26
• Crown Race: JIS (27.0mm)
• Weight: 115g

Please let me know if you think this is compatible or not. Thanks for the help!