S-1B1 — Interstate S-1B1

83 yearsmedian age

Of the 14 registered Interstate S-1B1 with a known build year (64% of the 22 we track), the median age is 83 years.

1changed registration in 12 months

1 of the 22 registered Interstate S-1B1 we track changed registration in the last 12 months (5% of the fleet), across 1 registration event. Registration changes include ownership transfers, re-registrations and address updates — not all are sales.